Further history of Unix of /usr

I'm not sure how people somehow come to the conclusion this relates to or has anything to do with systemd since having /usr on a seperated partitions was causing issues long before systemd inception.

In some cases it lead to unbootable system but in most cases things just failed gracefully ( not found errors in log if you paid attention to your bootup process ) after trials and errors and fixes to achieve that and then there where those mysterious bugs that could be traced back to /usr not being mounted when needed on bootup.

All that systemd has ever done was issuing a warning but I guess 2016 will be another year to blame systemd and everyone involved with for everything that is wrong the linux ecosystem and outside it...