I tested it a bit in a VM to get familiar with pacman and yay. Latest KDE Plasma 6 and more snaps in Ubuntu’s future are the main reasons I want to switch.
As I don’t use a separate home partition, I have an extra drive with BackInTime home dir backups and virtnbdbackup snapshots.
Is EndeavourOS stable enough for everyday use and would restoring home with BackInTime just work (as root user)?
Read up on .pacsave/.pacnew files, the distro might still work if an update creates these but if you don’t diff/integrate them manually your OS might slowly “rot”. So watch out for these when running an update. You’ll see them less often if you don’t change stuff much yourself.
Consider using BTRFS and test how to rollback, in case you need it.