But fixing it in Windows doesn’t mean they also need to fix it in embedded systems. Microsoft is in control of their whole ecosystem from the kernel to userland to visual studio. Microsoft could make C++ on windows sane without anyone else’s permission. Their failure to do that is on them and them alone.

I think browser vendors have the right idea when it comes to evolving standards. Vendors experiment using their own products and then come together and try and standardise their work at committee. I think that would be a much better idea than either doing nothing or, as you say, trying to boil the ocean.