Yep. There are still some annoyances like invalid UTF-16, so maybe there is more is needed than just the basic transformations — some precise handling or parame

Yep. There are still some annoyances like invalid UTF-16, so maybe there is more is needed than just the basic transformations — some precise handling or parameters specifying how to handle these edge cases could be necessary. Handling UTF-8 versus WTF-8, and properly round-tripping these representations, is probably a bigger issue than graphemes and canonical forms for most users.