Re: More Cyrillic vs UTF-8

[Richard Stallman]

    +* Encoding some characters as Unicode is rejected by Emacs.
    +
    +Emacs currently only supports the parts of the BMP whose codepoints
    +are in the ranges 0000-33ff and e000-ffff.  If you try to save a file
    +containing characters with code points outside this range, Emacs will
    +suggest other compatible coding systems.

That is clearer; it's written in terms of behavior the user sees.
I agree with the people who said that the codepoint numbers may not
be clear enough.