My desktop is 16.04 (well, whatever the Mint equiv is), but my two servers are still 14.04 and I have no plans to upgrade them. If I replace the hardware I may end up with systemd, but I am trying to avoid it for server as long as possible. For my desktop I care a lot less and it is becoming more difficult to get a newer linux desktop without it. I do not run server type services on my desktop machine, so my interaction with systemd is virtually none. I do have to use linux machines at work that run systemd though, so I am becoming somewhat familiar with it. Every time I need to run journalctl I want to scream.