Billy Gates :
Because HEDT processors are supposed to be beast of all trades. Beast in gaming, productivity, overclocking, and just all-out raw performance. The i9s dominate rach and every one of those criteria.
Gaming: the GPU is almost always the bigger bottleneck; get a more sensible CPU, buy a better GPU. It'll be better for
gaming.
Productivity: numerous workloads run just as well with far cheaper options. For rendering, one can simply build a cluster of cheaper options that have greater overall throughput.
Overclocking: requires costly cooling, very risky when the chip is so expensive, and default turbo bins cover most of the useful clock range anyway (only really worth doing if delidding IMO). It's not like the days of SB-E when one can easily push a CPU with a base clock of 3.4 to 4.8 on air without much worry.
Raw performance: at this cost level, especially with no EEC, anyone needing such performance would do well to consider dual-socket XEON and indeed TR/EPYC.
Where the XE has performance advantages, other aspects ruin how useful those can be. The thermals are ridiculous, any neceesary cooling solution for oc'ing being a significant extra cost, and a risk.
Something else to consider: it's easy to say oh the XE is the fastest for rendering, but some solo pro person doing that sort of thing would probably like to be able to continue working after they've started a render. The cost difference between TR and the XE (taking into account the more expensive cooling needed for the latter) is almost enough to cover the price of a completely separate Ryzen 7 system.
😀
If I had a budget high enough for a proper XE build, I'd get a TR system for rendering instead, and a separate Ryzen 7 for a workstation setup, I could then keep working while a render is going on, or combine the two for overnight jobs.
Ian.