I found that TiBackup was both the secret sauce that allowed for playing with ROMs with impunity, and also my primary reason for rooting phones back in the day even when I was just using phones in stock form.

It was the first app I ever spent money on, and I did so without any hesitation at all.

It was just genuinely useful to be able to back up and restore my own data on my own devices, and to do so on my own accord. It was a process that I owned, and controlled, and if it went wrong somehow then I was able to troubleshoot it and make sensible decisions.

I haven't had a rooted phone in a decade or so now. These days, backups allegedly happen -- somehow -- and the entire process seems to be both deliberately and inscrutably shrouded in mystery.

When I switch devices or reset to factory to try to fix an eSIM issue (or whatever I do that makes restoration a useful path today), then it's never clear before I start whether the backup/restore will magically work or if it will simply fail without recourse. The uncertainty demonstrates a reprehensibly terrible way to deal with backups.