This is a misconception. Arch breaks only if you mess enough with AUR. If you keep with official repo and maybe Flatpaks, you'll be fine

You can use AUR with moderation as well and you'll still be fine

Dunno, during 8ish years I have only hada couple of minimal problems due to updates (and the solution was promptly available on Arch homepage). Can't speak for other, though.

That’s not my experience - have been using arch for around four years and it broke only once by not letting me log into the system after I failed to update pam configs after the system upgrade.

We're using Arch 2

(No it doesn't, it just has some bugs here and there, e.g. my media keys don't work after a couple days of uptime (gnome). I stopped actively looking for and reading the release notes years ago as it just works... and if it doesn't, I still have a btrfs snapshot from before the update)

I tried Manjaro for awhile and had some major system breaks. Manjaro is/was often pitched as newbie-friendly arch, so having it break made me think arch was going to be even worse.

Been running endeavour for a few years now though, and haven't had any real issues. Much smoother than my Manjaro experience.