I believe someone mentioned previously %-COPY, but that isn't found in
the new
draft, and anyways, *-COPY is more general than %-COPY, and I can't at
the
moment think of why %-COPY would be preferred to *-COPY.

Also, is there any reason why it's COLLECTION-FOLD-(LEFT|RIGHT) instead
of
%-FOLD-(LEFT|RIGHT) or *-FOLD-(LEFT|RIGHT)?

Comparison isn't mentioned at all in the new draft, or in the old one,
but it
seems rather odd to leave out.  I should like to see some sort of
comparison
operation -- be it *=?, %=?, %= or *= (the latter two being consistent
with
SRFIs 1, 13, and 43), or something else entirely -- but at least some
sort of
comparison.