Comment by jchw

The main nice thing about the environment in systemd is that it is standard and mostly a blank slate, whereas at least for me I was always getting bit by the fact that the environment in Crontab was completely different from say, the environment inherited by supervisord or sysvinit scripts. In systemd the actual unit that gets executed is the same regardless of what triggers it, so there is no gap.

That does require you to still know what the default environment is, but it is a mostly completely clean environment, without any influence from any shell.

I'd have to concur that I agree this is an advantage of systemd.