Re: This is news?
Clearly, the specific vulnerability in the article wasn't caused, directly, by the instruction architecture.
But I was following up to a more generic issue over what you do with your system.
And I'd suggest that the vulns of this type (including Spectre,etc.) we're seeing today are, at least in part, thanks to the prevalence of a CISC architecture and the huge system complexity we now find ourselves with as we play whack-a-mole with each performance bottleneck that pops up.
Or whack-an-elephant back in the days of trying to sort out SMP.....