I haven't used systemd yet, but I'm concerned about having to learn a completely new way of doing things. I manage a number of servers, and it would be a huge inconvenience figuring out systemd. The old way works fine for me. Unfortunately most of the servers I work with are CentOS, and it seems Redhat has switched to systemd so I'm not entirely sure what I'll do in future. I guess now I have another option.