"Underlying vulnerability is caused by CPU architecture design choices. Fully removing the vulnerability requires replacing vulnerable CPU hardware."
SPARC it is then. That seems to be about the only server grade semi competitive CPU out there that's completely resistant to both Meltdown and Spectre.
The guys from Sun / Oracle must be feeling smug. I wonder if they had theorised about the possibility of this kind of thing and had designed for it, or were they simply lucky?