Between the release of the Voodoo 3 and Voodoo 4/5, NVIDIA would eat 3Dfx's lunch, but not (at first) by having better tech. They just built momentum by consistently releasing new cards every six months like clockwork, whereas the Voodoo 4 and Voodoo 5 cards were feature-oriented releases stuck in development hell. 3Dfx was still the sexy hotrod brand, although NVIDIA's market share kept growing. Then the GeForce 2 came along and it was clearly better than any 3Dfx offering, while people were tired of waiting for a new Voodoo card. The rest is history.
Pretty crazy how Nvidia grew from that to a top 5 company in the world in 25 years.
Also should note that back then, AFAIR ATI and Matrox only sold full cards.
Nvidia also allowed, relatively, a lot of customization of their boards back then. My first GF2 had VIVO and even LCD shutter 3d glasses for a CRT.
This is what killed them, they bought STB and couldn't actually afford to keep it all running.
And since back then any hardware accelerated solution that was supported by games was millions of miles ahead of software rendering... that was enough.
Apple was also on its dying legs at the time, and their stellar rise was even faster.
We got home, figured out how to install it and the drivers ,and booted up Unreal. Amazing moment in my life, and probably one the main reasons I ended up being a software developer. Tweaking settings, learning commands in the 'in-game terminal', understanding basic networking to help pick servers, tinkering with the level editor. PC Gaming was an amazing introduction to 'How Computers work' with a really motivating example. I feel like my kids completely miss that because they just play games on an ipad which completely insulates them from any of it.
GeForce came along soon enough and made it obsolete, but never had the same mystique.
Scalable Link Interface.
And it's not available today either. The last cards that used it was the 1000 series. The 2000 and 3000 cards used NVLink, but that's disappeared from the 4000 series, too.
Or, as a better example, compare the V-Rally game for the GBA with Ridge Racer for the PSP.
Deus Ex and Unreal could run under a 3DFX card. The jump from a software rendered Quake (or just any software rendered Unreal game) to a hardware rendered one was pretty noticeable.