Im not sure how it would fair as a regular workstation. Apparently the Ampere Altra is already being used for remote gaming workloads in China and it utilizes RTX 4090 for that.
https://www.ipi.wiki/products/com-hpc-ampere-altra?variant=43315757121698
It looks like a pretty solid value for 128 cores at 3000 bucks. Maybe even 32 cores for 2000. It is even competitive with M1/M2 macs and Epyc/threadripper.
that’s basically all you need to know. they make arm CPUs