i18n: internationalisation, a11y: accessibility

What I mean is, what does that have to do with a portable executable binary format?

All of that exists at a way higher level. It's like saying ELF binaries don't provide good i18n or a11y. I don't even know how to interpret that.

Sure, but as a 'dream' portable executable is kind of funny when execution by itself brings you nothing (except heating the CPU), you also need portable IO, security, i18n, a11y..

Your argument goes like Sagan’s

if you want to make an omelet, you also need to create the universe.

Your points being unrelated to wasm.