Re: `decode-coding-string' question

[Richard Stallman]

    Seconded.  Undecoded string is not text, strictly speaking, it's a
    stream of bytes with no clear notion of a character.

Since text properties apply to portions of a string or buffer,
they can make sense on encoded text.  So the idea is not nonsense.
There might be uses for it.

However, I am not sure it would be worth the work to implement
this, even if someone competent wants to do it.