no slides were never consumer that is why kchrome disappeared.
NatGeo, soft pornographic and fine art only.
C41 was >95% of market, faster, cheaper better prints
That is absolutely the opposite of the reality.
Close to 90% of the customer base for chrome were amatures and small home users of 35mm slide films. The entire slide market was based on that market segment. As soon digital cameras, and more then that Digital print labs which could make fast, cheap and high quality prints of any materials (including negatives and digital cameras) regular folks stopped buying slide films and 90% of the market was gone in 1-2 years. That was the end.
Video cameras might have had an effect as well, but those were cheap (relatively) and very popular since the early 90's yet slide films took the hit with the explosion of digital cameras 2001-2005.
Most pro photographers stopped using chrome when IRIS printers came to marker, and even less of them used chrome when Imcaons and labmdas started selling, and before they all switched to digital completely they used negatives, because they were cheaper, and MUCH easier to handle (exposure tolerance etc.).
Perhaps some old school print houses still used chrome, but all news photographers (except for some "silly" white house photographers, like the guy who shot monika and bill in the crowd), used negatives exclusivly, as all news rooms had super fast minilab film processors and funky nikon/leaf scanners. This was fast and the chance of having a non usable shot was almost non existent, but they always - shot negatives.
The fact kodak had a hard time selling something 10 years before that has nothing to do with the actual demise of the market, but just shows that bad management and product marketing is nothing new there.