If Nvidia/AMD want continued widespread adoption of high-end gaming hardware after mining dies, then prices will have to come way down. Of course PC enthusiasts have no price limit and they are automatic day one buyers of the best GPU at any price, so they will continue to be exploited successfully. But without miners to buy everything up, GPU companies will have to lower prices to offer products to the vast majority of consumers, including high-end buyers. Enthusiast buyers aren't high-end buyers. Enthusiasts are just as mindless and mouth foamy as miners are and will gladly steal from their own mother to buy an RTX 4090 tie for $5000.
Enthusiasts used to be in the same category as high-end buyers, but that has changed. High-end buyers have been well priced out of the best GPUs, but they used to buy them at $5-700. Now they cost $1500 minimum and $3000+ is coming with the 4000 series. Anyone who isn't rich doesn't spend $3000 on a GPU, unless you are in the new enthusiast crowd. Nvidia has isolated the most extreme buyers and has targeted them with insane prices. Can't blame them really, so long as they offer a good upgrade in that $5-700 range then everyone else should be happy.