This is the only way really to move forward with ISA extensions.

Though, I think for this update we don’t need to be too concerned. Since it changes the code in such an extensive way, compiler writers will be strongly incentivised to produce this duplicate path themselves. Instead of letting the burden of dispatching fall on the programmer like with AVX and friends

Well, yeah probably some websites will require it, probably google’s own will, and people will have to run two browsers for the sites that do, and the sites that don’t.

And yeah they can force sites to switch, by downranking them otherwise, like they did with AMP. But I think that’ll only really alienate people.

I would argue it doesn’t even make anyone’s life better, except google and advertiders’