I’ve bought a Nexus 4 to play around with Ubuntu Touch many years ago, but I really don’t think I could daily drive even a more powerful Linux phone. Many apps from messengers to banking apps are Android/iOS only, so it’d be really inconvenient to use — not to mention problems with calling and a not-so-great camera.
Almost all things I want to do on a phone are possible with a Pixel + GrapheneOS, which also makes an open source, secure and private phone OS.
Usually ssh’ing into a server through termux is all I need, altough it’d be cool to be able to plug my phone into a monitor and have a desktop with me all the time. But it being “cool” is the problem, as it’s not useful day to fay for me. If I need a pc I’ll take my laptop. I’ll probably try it at some point, but that’s many years into the future.