There are two types of Lua users

Don't forget Gmod modders!
- Glua is bizzaro world Lua though.
  
  It was so, so, so much worse back in the early days when the FacePunch forums still... existed.
  Probably a majority of forum posts, for years, were people screaming at Garry for making posts that just said something like 'its obvious how this function works, I don't need to explain it', and then oops turns out he did it wrong, new gamebreaking bug / exploit exists for 3 weeks, the first week of which was random forum people telling Garry he did it wrong and him temp or perma banning them.
  That or he would very often just rewrite entire core function libraries, make a tiny 8 word bullet point about it in an avalanche of a changelog, and then say something like, 'shouldn't break existing code', and then well, it would completely break existing game mode code, and then 80% of the most played custom game modes would be broken for a month or more while Garry just either ignored everyone, or told them he didn't care.
  ...
  Also, Roblox just is Gmod in many ways, but with a highly manipulative monetization model built in.
  All the Gmod RP servers would paygate player roles and content and such offsite, outside of the game, setup a webpage or forum that worked as an ecommerce site, run a dedi db and then API connect that into Gmod... Roblox is all of that, but self contained, and with a lot more lawyers on hand to prevent monetization outside of the game itself.
- Gmod is the first thing I think of when I hear Lua.

To me, Lua will always be the WoW plugin language.

Lua is a super underrated language. The standard implementation is under 500kb and it can run almost anywhere. Including inside other programs and on embedded systems that dont even have an OS.
- It is great for scripting things that do not need to run exceedingly fast, or are not exceptionally complex.
  2D games? UI? Absolutely.
  Even many subsystems of 3D games can be handled decently well. Procedurally populate a map with items, or generate some NPC populations or weapons or items based on mixxing and matching a bunch of preset components, throw some kind of event tracking and event driven system on top of already existing systems to give your world more depth and breadth.
  But by the time you get to... trying to do an entire 3d render pipeline for graphics more complicated than roughly an N64 or PS1, all of your netcode in a conplex and fast paced game, an entire dynamic 3D physics engine with many active objects... try to to that in Lua, you're probably not gonna have a good time.
  At that point, as the Open MW devs have shown... you can technically stilluse Lua to do this, but you've gotta be running your Lua through LuaJIT, that essentially compiles the parts of the Lua code that need that speed into C, and then run it in C.
  At that point, it arguably makes more sense to just... take those parts of the code and just actually, always, run them in C or C++ or Rust or something.
  ... But after saying all that, I do not mean to take away from what you are saying, which is that Lua is extremely flexble and absolutely does have a wealth of legitimate uses cases.
  
  I don't think luajit compiles lua to C and then compiles the C, that would be pretty silly. JIT compilers directly output machine code.
  And as long as you can do something in a higher level language there's no need to involve manual memory management or tracking ownership (rust)
  
  Lua can be pretty fast, but not Lua itself but Luau runtimes or LuaJIT

Dont forget OpenComputers users! Theres gotta be five of us by now.
- Including the people that only used computercraft?
  
  There are dozens of us! Dozens!!!
- I was sick and tired of not having full remote storage access after losing logistics pipes, we had refined storage and a computercraft peripheral mod for it so I wrote a server and client for remotely requesting items to be delivered via ender chest using the computer craft ipads and the computercraft internet. You'd type in a search query and it would display the top 10 items in the network containing that query and how many there were, then you'd pick the one you wanted from that list by entering its index, then you'd enter the quantity
  
  You made your own Applied Energistics 2 lol
- There are dozens of us. Dozens!
  (I am trying to set up an mail system on my server using modems and am suffering help)

Well, and then there's the guy who made Balatro in Lua.
- Using the love2D framework if not wrong
  
  Yup! If you have it on steam you can unzip the exe and take a peak at his code.

luanti mod dev?

Löve2D gets zero löve :(
- Lua doesn’t do zero, in case its users find the concept confusing
  
  Ok

The one time I used lua was to make a casino in Minecraft with the ComputerCraft mod like, over a decade ago. I enjoyed it. Even as a young lad I didn't like index from 1, though

You forgot computercraft players
- My turtles eat worlds!

Factorio mod dev?

World of Warcraft plugins and Awesome WM configs. There are some decent 2d game engines that use Lua too, like Love2d!

and PICO-8 devs!

Literally every game modding community ever:
- Except the poor people stuck with C# when modding unity games.

Computercraft enjoyers

Lua is great
People hate on it because they are too psychorigid to switch to lists starting from 1
- Burn the heretics!

And Löve 2d developers

The comments under this post should be pinned on lua.org. They’re the greatest advertisement for the language

Lua is actually a really decent language to work with, and it's pretty fast too, can compile it to executables, I think it's great

Today I learned there is a use for lua besides neovim

Don’t forget the one statistically to be enjoyers of war crimes.
Rimworld mod authors.

And BeamNG modders
Also fivem scripting
- That's cool, Multi Theft Auto (SA mod) also used Lua. Helped me learn programming in a fun way

WoW Addon programmers?

As a former Lightroom plugin developer I feel erased!

gmod dev

A random Awesome WM user has entered the chat

Fantasy Console devs

Factorio modders

Does anyone genuinely like the language on its own merits? Lua is an excellent alternative to other interpreted langs like Python or JS.
- Nah
  EDIT: After reading, I stand corrected. Lua is better than Python and JS for many usecases, mainly due to size and portability.
  Their versioning is weird though.

lua_State *L disagrees.

Dota 2

Isaac modding

Tabletop Simulator.
Doing that right now, unfortunately.

The helldivers 2 developers, for whatever reason
- also Subnautica
- probably because it uses the Autodesk Stingray engine which, this is more interesting than the Lua usage. It's a dead engine for long while but I'm surprised to find people who still just use it.

OpenMW modders

Also CoronaSDK users for making Android games back in the day

Payday 2 mod dev?

I'm using lapis for stuff.
^lua's ^c ^api ^is ^also ^really ^good

Conky users?

Me, an XPlane boi. Quietly flying with my Lua scripts.

lualatex?

To my surprise, I just found out that my favorite e-books launcher was entirely developed with Lua.
- Can you share its name ?
  
  Koreader. I don't know why I didn't in the first place. lol

Luanti designers too.

Lua is awesome, I added some scripting to toggle replay buffer on OBS and to save recording from buffer then restart the buffer. IE: Save last 10-15 minutes of gameplay.
Very cool to do it in Lua.
- Lua is awesome
  https://awesomewm.org/
  It literally is