[NikolaNovak]

Are we confusing things?

They're both RISC, but P9/P10/etc is based on IBM's own Power microarchitecture (possibly open sourced / open standard), I wasn't aware it had anything to do with Arm? I could be hopelessly wrong...

Or do you mean something different with "POWER"?

[mhh__]

Owning an IBM Power system is a daydream of many nerds apparently.

And power is open in that the ISA is open. Power10 is a bang up to date CPU so the internals are all closed.

[rbanffy]

There are other interesting ISAs that are not arm64. Sadly, the only ones that still could be viable desktop (more like deskside) are either server-grade ARM or IBM's POWER (and none of them makes Mac Minis).