Re: Quake vs Doom
You're not wrong, although Quake 2 is the one that really drove accelerator sales as it wouldn't work without one. Comparatively few people downloaded GLQuake, Tomb Raider probably did more on that behalf as it was re-released and bundled with various cards that supported it (from Glide through to S3)
ID's id Tech engines have been pretty consistently popular, although id Tech 3 is probably the most popular one.