No, please reread that mail from the release team. It is a *proposal* from
the systemd maintainers to implement full systemd support. The release team
have not said that they have endorsed this as a release goal (and frankly, I
don't expect them to do so; it's not the release team's place to decide what
Debian should use as its default init system, and to endorse such a release
goal would presuppose such a decision).