An init system must be an init system
Systemd problems
Since the adoption of systemd by Arch Linux I've encountered many problems with my systems, ranging from lost temporary files which systemd deemed proper to delete without asking (changing default behaviour on a whim), to total boot lockups because systemd-210+ couldn't mount /usr/local (whereas systemd-208 could; go figure).
As each "upgrade" of systemd aggressively assimilated more and more key system components into itself, it became apparent that the only way to avoid this single most important point of failure was to stay as far away from it as possible.
The solution: Remove systemd, install OpenRC
