I was never a big online player, but I loved cooperative stuff with my friends. Left4Dead, Borderlands, Diablo 2, Diablo 3, Remnant from the Ashes, Terraria, Grim Dawn, etc I met a bunch of guys in an online forum, we had our own section there and become good friends for over 15 years we had hundreds of thousands of comments, posts and just idiotic conversations about stupid stuff. We even met in person a few times, even though we lived in different countries.
I am over 40 now, all my friends have families, everyone is too busy and we rarely have time to play together anymore. Last year I think 3-4 times managed to arrange a session and we ended up catching up and just chatting about the good old days and life in general. Most of them are offline on Steam for over 2-3 years now, which is sad.
I am now almost exclusively playing single player stuff. Having a family and a full time job its not easy to find time, but its not impossible. Also picked up solo board gaming to decrease my screen time and I can say its been great.
I miss the old times, but its easier to arrange some gaming time for myself, I think I prefer it now this way. Still it sucks how fast we get old. Cant do anything about it, but I can still enjoy this hobby, just a little bit differently.