Ultimately, you probably won't have an option - just as one can't disable JavaScript today and still view most of the web. If the vast majority of people leave

Ultimately, you probably won't have an option - just as one can't disable JavaScript today and still view most of the web. If the vast majority of people leave WASM enabled, companies will build things using it. It seems likely that WASM will displace JavaScript over the next 20 years as engineers decide they'd like to use non-JS languages to build their client-side code. It will take time since there's a huge amount of JS that's already out there, but new projects will become less and less likely to choose JS. Some still will. Many people like JS. However, I think a majority of new front-end projects 10 years from now won't be JS.