Most things in Debian are optional, that's the beauty of the thing (and sometimes, the hassle, see the systemd "full integration" drama).
Also, previous commenter pointed out that I mixed ifplugd and ifupdown. He was right.
I said "full integration" because systemd is already in debian (http://packages.qa.debian.org/s/systemd.html ), it's just not the default init. So it's integrated, but not fully since not all daemons have systemd unit files.
Udev and systemd to merge
Posted Apr 6, 2012 16:53 UTC (Fri) by Eckhart (guest, #74500)
[Link]
Ah, then I just misinterpreted your original sentence. Thanks.