This leads me to believe that past usage was due to bad video cards, cheating before anti-wallhack (r_draworder cheat in WinQuake -- anti-wallhack completely destroyed effectiveness of that

As a result, I've been doing the old "#ifdef SERVERONLY" deal to the source rapidly to build a "no renderer, no cd, no sound" version as it is pointless to have the server have those kind of dependencies. Plus I wanna see how small the binary will be.

I peeked at FTE to see how it handled V_CalcRoll which is actually used by sv_user.c (to anyone who doesn't know).
Kind of funny how the original Quake (versus Quakeworld ...) is a bit of a convolution of client and server code mixed together.