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Not much is left of the great IBM, but their Z architecture is still superior when it comes to reliability at scale.

In fact, "what happened to IBM?", they were in the news recently: https://wccftech.com/ibm-worlds-first-dual-architecture-proc...

Creating the world's first dual instruction set CPU.

> Creating the world's first dual instruction set CPU.

World's first? What about the VIA C3 (or earlier NEC V20)? I'm sure there are more / earlier ones.

That's not the same thing, it's more like a hidden feature than the ISA of an entirely different CPU.

There was also the semi-mythical PowerPC 615 that was meant to have both PowerPC and x86 instruction sets. W