Yup and I am getting sick of hearing this even on Arch Linux. Like, mofo, you could literally run a snapshot or backup before upgrading, don't blame us if you're yoloing your god damn computer. Windows have exactly the same problem too and this is why we have backups. Christ.
On my Arch Linux Install, I literally have a Pacman Hook that would forcibly run backup and verify the said backup before doing a system-wide update.
in case software have a nasty bug like deleting your data.
Laughs in isolated flatpak
... but seriously most of my userspace software cant even access my filesystem? So even if some software blows up i doubt it could do any damage.
The combination of nixos to have a practical unbreakable system and flatpaks to protect your userspace is pretty great. Highly recommend it. - But having backups is of course still advisable as a 3rd layer of protection, in case of hardware failure.