Since quite some time I see varying messages about systemd having issues with
remote file systems vs. nfs related services vs. name resolution services.
Sometimes my NFS(4) server doesn't even start.

Here is an example on the latest TW version "openSUSE Tumbleweed (20160126)
(x86_64)":

#  journalctl | grep deleted
Jan 28 12:17:05 saturn systemd[1]: remote-fs-pre.target: Job
remote-fs-pre.target/start delete to break ordering cycle starting with
remote-fs.target/start

On some other systems I see have this:

nss-lookup.target: Job nss-lookup.target/start deleted to break ordering cycle
starting with rpc-statd.service/start
rpc-statd.service: Job rpc-statd.service/start deleted to break ordering cycle
starting with nfs-server.service/start

As this is not predictable and may lead to some important services not being
started, I rate this rather important.