It works great for my frequency of use. I then use "hot" if I return within an hour or two. Some mornings, I'll scroll Top 6 hours for the main stuff and switch to hot for more pressing news while I'm having my coffee.
I just leave mine on top 6 hours, and it's been plenty for my use, but if scaled can show me smaller communities where I might find new stuff, I'll definitely try that!
Hopefully someone else chimes in but I know that there's one app that allows you to export your Reddit communities here. [Finds Lemmy communities of the same name as the Reddit ones.]
Voyager has this option, but I did not use it, so I don't know how well it does.
I search for a community and add the one with the most users or most recent posts. If it isn't active, I find a less broad topic that would encompass that community.
I also spend most of my time on "all" and find active communities that way
Those things aren't strictly related. Lemmy is open source and there are a bunch of apps. There also used to be a bunch of Reddit apps, but Reddit wasn't open source. The important factor is that the Lemmy software provides an API (application programming interface) which app developers can use to talk to Lemmy instances. API access is free, like it used to be on Reddit.
Interesting, I was expecting this to be at the beginning not recently, but it seems it was open source up to 2017 - but I'm now realising that 2017 is fast approaching a decade ago so might not count as recently.