@ennenine Well, it depends on what apps you need. I'm running postmarketOS on a PinePhone, but I'm only using it for listening to music (not many mobile-friendly music players, since most mobile Linux apps are just desktop apps which can may or may not be scaled down to mobile screen, but Amberol and the new Vinyl are fully functional on mobile too), and for jogging (Exercise Timer app). Also used SMS, it mostly works, but sometimes the system needs to be restarted to receive new messages. As for Android apps, there's Waydroid, but I couldn't get it to work on any distro I tried on, it can't access the Internet for some reason, tried to troubleshoot but couldn't figure out what's the problem, didn't bother with it too much.
Overall, mobile Linux can be good for some basic usecase, but don't expect it to be a full-blown Android or iOS replacement, rather a Linux machine in your pocket. But I mean you can flex with using a terminal for your friends lol