I have the opposite experience, I have had several breakages with Arch in a years time. (without Timeshift - i would have been totally lost how to fix the breakages).

So right now, if i run a system upgrade (pacman -Syu) my system would not boot.

- i had to exclude linux (nvidia,nvidia-utils) from my pacman system upgrade.

- even then most stuff seems to work, except for steam... however, i don't see any log messages that indicate whats wrong.

- so my current conclusion is not to upgrade for another week or so and then try again...

Also, during the gnome 4 transition I had a similar issue that i had to wait "several" updates until the system upgrade wouldn't break my desktop.