I have to say that using Linux on a phone feels... nostalgic? Kinda like Windows Mobile PDAs used to or Android in the very beginning (in a good way).
These days mobile OSes obscure everything from the user, actively punishing them for rooting their devices or instaling custom builds.
Linux on the other hand feels like ~2008. You have apps for daily needs (like you did on PDAs back in the day), you can consume media (reading books, watching movies, listening to music).
But if you're a curious person... there's a terminal. You can see exactly what your device is doing and how it works. You want to know which GPS satellites can see you? No problem, just query the modem-manager or use simple GUI app that will tell you the name of a satellite and which system/country it belongs to (turns out my device supports GALILEO, neat!).
Im really enjoying it. Two years ago I would say it was still unusable, but now (despite WiFi, Audio and Cameras not working on my device yet) it's... neat.
(Post written from xiaomi-pyxis running postmarketOS with Plasma Mobile while walking back home from a supermaket btw)
@elly Frankly, if I wanted to switch to Android I'd probably have many of the same problems with adjusting that people switching the other way tend to have.