> No, the problem is that JavaScript has not been replaced by something better before now.

I suspect replacing Javascript was an out-of-scope task for the people trying to design a `sort` function.

> and backwards compatibility requirements prevent

WASM will work just fine without breaking existing websites. People can hate on Javascript all they want, but "don't break the web" is a good policy that we should be encouraging in most cases. If anything, there's been a kind of harmful trend from browsers like Chrome in the opposite direction, and I think it's bad for the web to make it into a less stable platform.