Actually POWER won’t die, because it has IBM behind it and the POWER architecture forms the backbone of their highly profitable mainframe and high-end server business.
What I was referring to as possibly dying was POWER on the desktop generally, and Raptor/Talos specifically.
IBM Z mainframes don’t use the POWER architecture, but have their own z/Architecture instruction set and CPUs: https://en.wikipedia.org/wiki/Z/Architecture
Well yes, it probably is. That's another reason why everyone is ignoring it.