I had just mentioned this in a similar post, but Discord culture has really killed multi-player games for me. Especially guilds in MMORPGs. I remember joining one before 2010 felt like this very regal thing. They were these sacred orders of gentlemen with cool names like "The Iron Wolves", "The Order of Light", or "The Knights Templar". Upon initiation you were inducted into a fellowship and granted access to private forums to stay in touch and keep up with the guild. You'd get to know the more productive members who would forge you equipment and look after you. You would gather in great halls beneath the severed head of the world dragon and discuss official guild business. Somewhere along the way that magic just died.
Now the guilds are all edgy and gamey, like "HATE", "FURY", "APEX", "FIRST IN", and "METHOD". Initiation involves two paths. You either remain in relative obscurity in the fringes of the guild, never really growing much or forging meaningful relationships, or you take the other fork; walking closely with the sweaty, most egotistical edge-lords of the guild who don't actually care about or support you, and spread toxicity throughout the ranks. Both paths tend to require you to live in Discord, partaking in constant banter with a group of perpetually online sigma males. It's like plugging yourself in directly to the guild hive-mind and permanently altering the game's atmosphere. You're just playing "ENVY" now, or whatever your dumb guild is called. I've joined guilds that want you to have Discord on your phone so you are connected even while offline. That's fucking nuts.
Anyway, that garbage doesn't exist with single-player games. I can read dialogue at my own pace, toggle walk through the entire village to take in the sights/sounds and slow down the pacing, and truly absorb every last bit of that wonderfully thick atmosphere. Single-player games are so much deeper for me.
Take a heavily modded playthrough of Skyrim for example, with camping/tenting mods. Dusk begins to fall and you hear the call of a northern flicker in the forest around you. Better make camp. You find a clear spot outside or town and pitch a tent, raise a tanning rack, and build a fire. Now it's getting dark. You walk to the river's edge to fill your waterskin and return with a large salmon to cook over the fire. Now the stars are out. The score is swelling to inspiring highs that move your soul. The aurora dances above you in brilliant colors. You sit beside the fire and thumb through your inventory, deciding which lore book to read first. After some time you study a spell or record your thoughts into your journal, then quell your fire and sleep.
That's my shit right there. That's a single-player game.