[naniwaduni]

Case-sensitivity is, more or less, a default: you have different strings that have distinct encodings, so you treat them as different identifiers.

The alternative to case-sensitivity requires your compiler to know about case, and, more importantly, how to do case-folding. At that point, you can either choose to (a) restrict identifiers to a Some (probably ASCII) limited subset of characters, (b) only make some subset of acceptable characters (reliably) case-insensitive, (c) require every compiler to have tables for case-folding.

That's before we get into the locale-dependence of case-folding, which makes the letter "i" unreliable.

And you still have to distinguish Color and Colour.

[exitcode00]

It is actually possible to define all of those things in a compiler standard and force them to do it certain ways or document possible "implementation permissions", but, again unicode identifiers are rare in practice because programming is designed for English speakers like it or not.

http://www.ada-auth.org/standards/2xaarm/html/AA-2-3.html

> And you still have to distinguish Color and Colour.

Still have to do that with case sensitive langs - whats the point here?