For very wide bytes ;) I'd a sequence of code units instead of code points. Sadly that holds true for many string implementations in programming languages, oft

For very wide bytes ;) I'd a sequence of code units instead of code points. Sadly that holds true for many string implementations in programming languages, often for history, compatibility, or efficiency reasons (e.g. C#could have done it right, being designed after the UCS-2/UTF-16 split, but they didn't for various reasons). So you get code unit sequences with a few functions tacked on top that add code point support.