Exactly this. In fact I first thought of https://ucsx.org/ https://ucsx.org/ then realized that JS strings do allow lone surrogates, and then further realized t

Exactly this. In fact I first thought of https://ucsx.org/ https://ucsx.org/ then realized that JS strings do allow lone surrogates, and then further realized that none of this don't matter at all because the external storage format is entirely disconnected to the JS semantics. So as long as we can agree on which storage format to standardize and upgrade everything accordingly (which would be really a drama), JS wouldn't make an additional dent.