I believe all changes to https://wg21.link/P1030 path_view requested by
SG16 have been made. Options:

1. SG16 from examining the R3 paper gives acclamation that all remaining
Unicode issues have been tackled by R3, and LEWG can press on with
design review.

2. SG16 would like to take another pass at R3 in Belfast, examining each
API in turn for corner cases, and if the right choice has been made.

The newly rebuilt reference implementation has been in production use
for about two weeks now, and it seems to work okay. Upgrading previous
code was quite the pain however, the literal equality comparisons were
particularly code-breaky when comparisons previously did a unicode
comparison.

The new approach is much better, efficiency wise, however. It turned out
that old code was doing really stupid stuff like comparing paths within
a hot loop :(, and that has now been fixed :)

Niall