Hi,
at https://git.devuan.org/farmatito/migration you can find
the latest and greatest Debian to Devuan migration script
supporting Trixie to Excalibur conversion.

Supported DE’s:

   GNOME/GNOME FLASHBACK
    LXDE
    LXQT
    XFCE
    KDE
   MATE
   CINNAMON

SERVER migration is unsupported.
if you are not sitting in the same room with the server
do by hand.

This script is tested only in virtualbox as I don't have
machines to migrate right now.
Backwards compatibility for previous versions' conversion should
work but is untested.

I hope there are some fearless testers!

Hints, improvements, code cleanups and critics are welcome.

Ciao,
Tito