alt Hacker NewsWorkstation-class machines are very much available, at workstation-class prices.
You can buy a 64-core 7985WX Threadripper Pro with Nvidia RTX6000 and 256GB RAM for $30k or so.
Upgrade to an A100 if you're in a hurry.
They're not unusual in commercial video and animation, machine learning, and general science/engineering.
TBH you could reasonably class the $4k M3Ultra Mac Studio as a low-end workstation-grade machine for some tasks.
This might not be the most rational thing to say but I think "workstation" means "Unix workstation" which means "non-x86".