For contrast, id went from Doom to Quake III Arena in six years (Dec 1993 -> Dec 1999). Thanks to the rapid pace of graphics card improvement and the engineers

For contrast, id went from Doom to Quake III Arena in six years (Dec 1993 -> Dec 1999). Thanks to the rapid pace of graphics card improvement and the engineers writing the software engines to keep up with it (Carmack, Sweeney, etc).