*nix got lucky by always treating filenames mostly as bag of bytes (except for / and NUL), which delegated encoding to applications and typical passthrough from

*nix got lucky by always treating filenames mostly as bag of bytes (except for / and NUL), which delegated encoding to applications and typical passthrough from argv to fopen worked fine. Arguably WinNT way is more ambitious and reliable, but I think ignoring UTF8 existence until 2019 was huge mistake.