[the_mitsuhiko]

PyPy uses utf-8 internally and it’s completely hidden from the user. That’s however possible because in Python there was always a UCS2/USC4 leak to the user code so you could never really rely on anything.

I expect other languages to make the switch sooner or later.

I do think though that this is not all that interesting for the issue here. WASI needs to pick some format and picking UTF-8 is fine. Roundtripping half broken UTF-16 is something that does not need preserving.

I think enforcing UTF-8 there won’t be much of an issue in practice.

[dcode]

I guess we are about to find out whether there is substance to the precedents. My bet is on "what can go wrong, will go wrong", even more so on Web scale. Let's hope I'm wrong.