MIPS is increasingly common in rock helmets. Black Diamond (anecdotally the most common brand I see in the US) now has it in their higher end models, and Mammut as well.
Considered these things a gimmick (any technical equipment bought has list of various tech used within, I generally ignore that by default since I have no idea what each means), happy to see move for more safety in this area. Even small steps matter.
I will climb in big heat wave we have here in Europe now this evening, more sweaty = more slippery on polished rock crags, risk is always not as far as we like to think.