Yes, because then we won’t have to read questions like this (from you) anymore.
(More seriously, no one can tell you what to do. I don’t regularly use any public chatrooms anymore because I have better things to do with my time nowadays, but I pretty much grew up on IRC, so I can’t give any advice to a stranger.)
Mix of both. Messengers, Mastodon and YouTube, mostly apps (except when I want to listen to YT in the background). Maps and games, also apps. But for Lemmy I use the web frontend because I haven’t yet found a convincing app and the web frontend is good enough.