1. All the persons who built the lilypond build system left the
project. Correct me if I'm wrong.
While probably correct, it is irrelevant to the discussion.
Who is going to fix all the issues related to website generation and
translation? Who is going to spend work on trying to understand
something extremely complex which can be useful only within the
LilyPond project? I would not be optimistic...
But fixing those issues, if there is a *pressing need*, will be much,
much simpler than converting everything to a new documentation system!
Right now, it simply works.
2. We still depend on texi2html and the help request by
Jean-Charles, who tried moving to texi2any, not surprisingly was
ignored:
http://lists.gnu.org/archive/html/lilypond-devel/2015-05/msg00032.html
The `non surprisingly' is polemic. As you certainly know, if noone
answers on the mailing list, the request is not ignored, but nobody
has time or knowledge to help – I really would love to help, but I
also don't have time currently. Just imagine that all developers
write I'm-so-sorry-e-mails for every request...