[..]"Even worse, Xorg has a mandate to never break userspace"[..]
Xorg is a major fundamental part of the "desktop" part of "Desktop Operating System
The fact that you even listed it as an "issue" with Xorg immediately disqualifies you from making any further statements on the issue
If you think that it's acceptable for a minor software update to break down potentially hundreds of not thousands of office workstations then you are quite frankly insane