If we're talking about 20 years from now, nobody cares about popular frameworks. Huge majority of websites use old code and they must not break. Backwards compa

If we're talking about 20 years from now, nobody cares about popular frameworks. Huge majority of websites use old code and they must not break. Backwards compatibility of web is a huge deal. So deprecation of JS just will not happen in that period of time. What could happen is that browsers will support wasm natively and they'll translate JS into wasm. I'm not qualified enough to judge whether it would be possible to achieve current levels of JS performance with that approach, but theoretically it could be possible. In this case only wasm security will matter. But I did not hear about any kinds of those plans, those are just my wild speculations. So deprecating of JS is not going to happen anytime soon. Wasm will accompany JS and that's about it for the foreseeable future.