I mainly use my phone for messaging (ie. Signal, Whatsapp etc), web browsing/social media (forums, lemmy, bluesky etc), and video viewing (jellyfin, alt youtube frontends, and netflix)
Are all these things possible on a linux phone like a Pinephone?
You can run Signal on Waydroid yes, last I tried (about a year ago) the on screen keyboard didn’t work right, and there were issues with Push notifications. Maybe things have improved since, but nonetheless it’s a pretty crappy experience.