That's a very good point. There's still a use for locale-insensitive diacritic-insensitive searches, but you're absolutely right that in most cases you'd want i

That's a very good point. There's still a use for locale-insensitive diacritic-insensitive searches, but you're absolutely right that in most cases you'd want it to be locale-aware and therefore NFD isn't sufficient (though it may still be easier to do this on NFD than NFC).