I would say the server market could easily adapt to Arm, Power or RISC. However I would concede it's very difficult to replace the desktop/laptop workstation. However Chromebooks are making great strives on this. Yes, they are still sending lots of data to Googles servers, but they do a lot of opensource work. Look at coreboot with depthcharge, which can give you a pretty free (not 100%) Arm notebook.

The newest super computer, summit, ranked as the largest/fastest runs ppc64le which definitely creates an argument that there is an alternative to x86 for servers.

Things that run on super computers tend to be developed specifically for that exact computer so they can use whatever they want.

POWER is actually competitive on price/performance now.

Eh… Not for the home enthusiast workstation market.

The CPUs are actually kinda reasonable (Raptor sells the 8-core for $595, which is only $95 more than the launch price of the Ryzen 1800X).

But the lite mainboard is $1,099.

That's 5-10 times more that a board for Ryzen. And a lot is missing on the "lite".

Context here is "server and workstation market".

The Ryzen 1800X is not a comparable CPU.

Huh? This has nothing to do with x86.