I think systemd plays by the rules as regards both Free and Open Source
software, where it falls short is when it comes to the Debian Manifesto
https://www.debian.org/doc/manuals/project-history/ap-manifesto.en.html

The Manifesto really foresees the situation that has been allowed to
occur with Debian and IMHO is a strong statement against what has been
allowed to happen.

Devuan is in the real spirit of Debian, something that has been lost
sight of in the original.

Clarke