I finally created the perfect JavaScript runtime: No-JS
Every line of code has been audited by all security researchers. The implementation is language agnostic and extremely slim (0 LOC). It runs all the JavaScript I want (none).
Ironically, such a site would more bugs then of it would use Javascript. And security issues are still an issue too.
Basically everything has to be handled through forms and a site reload and hidden components and lots of css :hover events. Have you ever tried making a dropout without Javascript? It isn't impossible, but really hard.
And such sites exist. Just that they're mostly Darknet sites like like Dread or Bohemia