I don't think the binary AST proposal changes the accessibility status quo. In my mind, the best analogy is to gzip, Brotli, etc.
If you had to have a complicated toolchain to produce gzipped output to get the performance boost, that would create a performance gap between beginners and more experienced developers.
But today, almost every CDN worth its salt will automatically gzip your content because it's a stateless, static transformation that can be done on-demand and is easily cached. I don't see how going from JavaScript -> binary AST is any different.
If you had to have a complicated toolchain to produce gzipped output to get the performance boost, that would create a performance gap between beginners and more experienced developers.
But today, almost every CDN worth its salt will automatically gzip your content because it's a stateless, static transformation that can be done on-demand and is easily cached. I don't see how going from JavaScript -> binary AST is any different.