Someone actually wrote a scheme back in 2017 https://github.com/google/schism so this isnt new. Infact the whole idea of WASM is not new, 20 yrs back Sun had the same idea, embed compiled bytecode inside browser called applets, developed in JAVA. Even flash was a similar idea, though flash VM was riddled with security flaws. This failed to gain wider acceptance, now 20 yrs later we have a embedded bytecode compiler in the browser, but it may work this time.