Problem with Ubuntu is it doesn’t auto update and it’s very hard to get it to do that. Not sure it’s even possible to auto update major releases as well.
Every time I have installed Ubuntu for someone, I have come back years later and it’s still on the same version.
I am not sure about major release upgrades. But if you are on an LTS release, this should cover it for five years. And as much as I dislike snaps, they do auto updates too, so in 22.04 Firefox at least keeps up-to-date too.
Every time I have installed Ubuntu for someone, I have come back years later and it’s still on the same version.