I like appimages personally.Find them useful when i have conflict of depencies in package manager.I don't like snaps comparing to flatpak.Flatpak let u add custom repositories but not snaps ,canonical want to control from where u will install snap apps.
How awful are modern phone looks, missing old times before iPhone X and small sizes.
Recently checked ,Ubuntu already removed more old version libllvm15 from their repo ,only new one available.But I am not recommended u to use brave browser they are lieing about privacy things,if u really need chromium engine and deleted bad things of google ,try ungoogled chromium :)
Happened to me too, i signed out and login again.