X.org is one of my longest-used pieces of software. I've used it for 25 years (at the time it was called XFree86 and you had to calculate your own modelines to get hi res), and it has worked incredibly well for me. I've written software some 20 years ago that still runs just fine (some xscreensavers) and I still use it today.
Oh, man. "It this a Sony Trinitron 19in CRT running at 65Hz, or is this a Gateway 17in monitor running at 60Hz? Why can I only see the left half of my desktop on the right side of the screen?", etc.
Kind of a shame.