How about hardware accelerators to interpret JS? At least it wouldn't break, cause modern JS all transpiles to the old one.

bpf isn't a far stretch from that

yes, although more directly relevant here, chrome-compiled-to-wasm-nested-in-chrome

Firefox's font rendering is sandboxed by being C/C++-compiled-to-wasm-then-aot-compiled-to-native-code. Yavascript is dead, all hail WASM.

https://hacks.mozilla.org/2020/02/securing-firefox-with-weba...