Then I bought a 3DFx Voodoo card and started using Glide and it was night and day. I had something up the first day and every day thereafter it seemed to get more and more capable. That was a lot of fun.
In my opinion, Direct X was what killed it most. OpenGL was well supported on the Voodoo cards and Microsoft was determined to kill anyone using OpenGL (which they didn't control) to program games if they could. After about 5 years (Direct X 7 or 8) it had reached feature parity but long before that the "co marketing" dollars Microsoft used to enforce their monopoly had done most of the work.
Sigh.
Maybe being 1999 it was just a little bit too late to still fully appreciate 3dfx and modern day D3D and OpenGL took over around that time, so I just missed the proper Voodoo era by a hair.
Note that by OpenGL here I meant OpenGL using the Riva TNT (I assume the Voodoo card drivers must have been called Glide or 3DFx in the settings). I've always seen D3D and OpenGL existing side by side, performing very similarly in most games I played, and supporting the same cards, with GeForce cards etc that came later. I mainly game using Wine/Proton on Linux now by the way.
32bit on TNT at half the framerate, performance hit was brutal. 16bit on TNT was ugly AF due to bad internal precision while 3dfx did some dithering ~22bit magic
"Voodoo2 Graphics uses a programmable color lookup table to allow for programmable gamma correction. The 16-bit dithered color data from the frame buffer is used an an index into the gamma-correction color table -- the 24-bit output of the gamma-correction color table is then fed to the monitor or Television."