My understanding is there's issues around POWER10 that stopped it from being adopted: https://www.talospace.com/2021/09/its-not-just-omi-thats-tro... . For me personally, having worked enough with embedded POWER chips to get weirdly comfortable with ISA, given the choice, I'd love to have a system like this to write pure ASM stuff on. Not for any practical reason in the slightest; pretty much in the same spirit of souping up a go kart.

On that note, out of curiosity, how do these compare with x86 and ARM chips from that era?

I was hoping TFA might have news to indicate if any of that was addressed in POWER11... but doesn't seem to.