Purely anecdata, but I've lost count just how many Ubuntus (more accurately Debian and derivatives, I guess?) I've murdered in cold blood with sudo apt update and sudo apt upgrade.
That's just normal updates; I've never had issues doing that.
That said, in-place updates to a whole new release has been fraught across every distribution I've tried it on, whether Debian-derived, RedHat-derived, or even a few something elses.
(Gentoo being rolling didn't have that issue, but instead different problems.)