systemd has a horrible security track record and should not be allowed on any server that is connected to the internet.
The last remote-root exploit from 2 months ago: https://www.theregister.co.uk/2017/06/29/systemd_pwned_by_dn...
The major distros urgently need to get rid of systemd and return to proven, modular init systems.
systemd was the biggest single mistake in UNIX history.