Grapheme clusters are locale dependent. Also, if you aren't allowing combining characters, then you are going to need lots of extra codepoints. In some language

Grapheme clusters are locale dependent. Also, if you aren't allowing combining characters, then you are going to need lots of extra codepoints. In some languages, like Indian ones, vowels are combining characters. Or there are languages where multiple code points produce grapheme cluster, like Hangul syllables. You are going to need a lot more code points to represent all possible strings. Text processing is going to be much harder cause there a thousand different representations of Hangul character. Also, backspace is locale dependent. In some languages, backspace removes the accent, which makes sense with combining characters, and other it removes the whole character. Which is going to be fun when whole syllable is code point. Languages are hard, there is no way to make them simple.