I strongly disagree the solution is polyglot browsers. This necessitates not only inventing a new web language(s), but then getting widespread adoption of them.

I strongly disagree the solution is polyglot browsers. This necessitates not only inventing a new web language(s), but then getting widespread adoption of them. And IF you could do all that, what would be the end result? Fragmentation. Now anyone whose browser doesn't support your new language(s) can't visit your site. Unless you create a fallback site in HTML5/JS. So you've saved yourself no trouble and only created work for yourself. It's ridiculous. The obvious way the web has been going for 20 years and will continue to go is refinement and improvement of HTML/JS.