Fwd: NBSP supposed to stretch, right?

[QSJN 4 UKR via Unicode]

Agree.
By the way, it is common practice to use multiple nbsp in a row to
create a larger span. In my opinion, it is wrong to replace fixed
width spaces with non-breaking spaces.
Quote from Microsoft Typography Character design standards:
«The no-break space is not the same character as the figure space. The
figure space is not a character defined in most computer system's
current code pages. In some fonts this character's width has been
defined as equal to the figure width. This is an incorrect usage of
the character no-break space.»