Theoretically, yes. In reality, not so much.

I blocked the install of systemd way back. Recently I tried to upgrade postgres+postgis. Turned out that postgis had a dependency on a package with had a dependency on a package which had a dependency on another package which had a dependency on systemd.

So I tried compiling it myself. One of te build dependencies had a dependency on a package which had a dependency on a package which, you guessed it, had a dependency on systemd.

I finally gave up and moved the database over to a jail on my freebsd box.