Javascript may be around, as a compatibility layer at the very least. I tend to agree with the sibling comment, though: WASM at the base, compiled from Javascript (and just about every other language you could want). WASM isn't something you'd be likely to hand-code, it seems like.

None of that changes this fact for me: JS/ES is completely irrelevant to me as a development language. I've learned a bit and found portions reminiscent of a few other languages, but I don't really have a practical use for it, myself.