I am still amazed that IBM is pushing their POWER processors forwards for things like their System Z Mainframes. From what I have heard they are still really fast with I/O and general shifting of data but I'm not sure how much better than is than the alternatives.
Wouldn't be surprised if that finally gets sunset in the next few years.
POWER still exists? That's kind of neat. I had a POWER 1 rs6k way back. Almost wish I'd had room to keep it just as a sort of museum piece. The processor was several chips on one or two large PCBs IIRC.
https://en.wikipedia.org/wiki/POWER1 IRC.