Answer 1

If you want my thoughts...
I gave it a go some time last year and it felt unnecessary, especially for this audience. Why deal with the hell that is C,C++ when JS was made to be easier and cleaner (which I agree, though I love C and C++ more).
I mean JS is fine as it is, Chrome (default browser for many Android phones) has a strong engine, internet speeds are a lot higher (parsing, compiling, and executing JS is slower than WASM), Android devices are more powerful than the average PC, and our projects arent too rough where we have to use WASM.
The strains mostly come from the mis- and improper use of media (audio, video, images, etc) which isnt so much a JS issue.
I will, however, send this question to be evaluated and see if it qualifies for a new feature in the future ;)