It just might not be worth doing until browser vendors have a consistent renderer across all platforms (true for Firefox and Chrome) and until Apple loses its leverage. It might also be that it requires coordination and cooperation across all browser vendors to a degree that is unlikely. I’m not privy to the internal politics, so I don’t know which is the case
You seem very animated about some aside I made in my OP comment, that was obviously made as a speculation. Not sure why. We're both speculating FWIW, so there's no real argument to 'win' here, not even a wager I'd consider making.
Indeed it was speculation. So I asked you basically what your speculation was based on. Because we have a platform where no such speculation is necessary: Android is the dominant mobile platform, it already has all the capabilities you speculate about and so on.
So, given that Android exists, and we see literally nothing come out of it as far as web apps are concerned, what are basing your speculations on?
So. Again and again I ask the same simple question: have all the things you're talking about happened there?