[Development] Why can't QString use UTF-8 internally?

[Rutledge Shawn]

On 11 Feb 2015, at 18:15, Konstantin Ritt <ritt.ks at gmail.com> wrote:

> FYI: Unicode codepoint != character visual representation. Moreover, a single character could be represented with  a sequence of glyps or vice versa - a sequence of characters could be represented with a single glyph.
> QString (and every other Unicode string class in the world) represents a sequence of Unicode codepoints (in this or that UTF), not characters or glyphs - always remember that!

Is it impossible to convert some of the possible multi-codepoint sequences into single ones, or is it just that we prefer to preserve them so that when you convert back to UTF you get the same bytes with which you created the QString?