I have a Debian HTPC system tracking testing and systemd tried to save from the indignation of PulseAudio. Given configuring ALSA for AC3 S/PDIF is not as easy as it should be, I let PulseAudio stay on my system.
Then came systemd and any application (Flash, KDE itself, VLC) would hang as soon as it attempted to output sound. "PulseAudio --start" instances would just multiply and multiply.
My girlfriend was somewhat annoyed that she couldn't watch her programmes, and trying to work out what was happening was getting to me too.
After battling PulseAudio and ALSA settings, I was started to question if it was a mistake to leave PulseAudio installed all this time. Systemd was trying to help me see my error.
However given my girlfriends mood and lack of patience, as well as the fact that everything worked before Debian switch my init system, I tried apt-get install sysvinit-core and reboot (mostly out of desperation). From that moment on we've had no problem with sound, PulseAudio nor any of the other 'bugs' that showed up recently.
Given my sense of humour, I find it hilarious that systemd seemingly broke PulseAudio. Beyond making me laugh it also induces a sense of nostalgia. As I was in Uni all those years ago, I remember playing CoreWars. This was a game where two users would to develop a programmes that tried to avoid and eradicate the other users program.
Up until I removed systemd I imagine a similar battle being waged on my HTPC. PulseAudio battling with PID 0 and spawning many copies of itself as protection. On the other side systemd using it ultimate control of the system to hijack dbus and udev in order to isolate PulseAudio and to prevent it from communicating with the outside world.
If it weren't for the non-amused look on my girlfriends face, I might have let the two battle it out. However as it stands PulseAudio has won, as systemd is no longer running on the system. Did good or evil win? We'll never know. Suffice to say during the whole affair systemd said nothing, not a single peep to stdout nor stderr.