Yep, my point was my experience in 1999 with XFree86 was with Linux, which was less stable than today per se, before that I only used Xsgi on SGI Workstations,

Yep, my point was my experience in 1999 with XFree86 was with Linux, which was less stable than today per se, before that I only used Xsgi on SGI Workstations, which was proprietary and was already HW accelerated.