I meant that any update can bring issues, it's not "I installed and it works forever"

I use Bazzite at the moment, and it actually is that. No exaggeration.

And if an update doesn't work (hasn't happened to me in the 2 or 3 years I've been on Bazzite), ostree means rollbacks are instant and failsafe.

Bazzite also uses topgrade as the backend for its system update utility (just a "ujust" command), and it updates everything including flatpaks and firmware.

So it really is just one click to update everything and it never breaks.