We experienced quite a few problems tonight ALL of which were Poettering related, that is to say caused by bugs in systemd.  One of our physical servers hung during the start up process in systemd, as did half a dozen virtual machines.  I wish I could travel back in time and give his father a condom.  Everything was back up at about 12:10AM and various services that didn’t start fixed by 1:49AM.  With the exception of misconfigurations on two customer virtual private servers, EVERYTHING was the result of systemd errors.