I'm not sure what artemis or orion are, but you can blame defense contractors for this. Nobody ever got fired for hiring IBM or Lockheed, even if they deliver unimpressive results at massive cost.
One of the tradeoffs of radiation hardening is increased transistor size.
Cost-wise it also makes sense - it’s a specialized, certified and low-volume part.
And to be clear, I love power chips. I remain very bullish about the architecture. But as a taxpayer reading this shit just pisses me off. Pork-fat designed to look pro-humanity.
Citation needed
> much less hiring fucking IBM
It's an IBM designed processor, what are you talking about?!