What went wrong with Cyrix?
Companies without their own Foundries tend to suck. AMD lost theirs a few years ago. It's when they started to suck.
The only reason NVIDIA and AMD are a cartel on the GPUs is that NVIDIA doesn't have Foundries either and they hold hostage the patents like the good patent hogs they are.
If the market was open to foundries like Samsung and Intel both would be dead 10 years ago, performance would be better and prices would be half.
They got blacked