Although Arch uses systemd now by default, which is bad. I've replaced it with OpenRC. http://systemd-free.org has instructions if you want to do it yourself.
I had done some research at the time, and came to the conclusion that it was systemd that allowed Linux to boot up so fast.
What is your experience with OpenRC?
Anyways, you don't need systemd for a fast boot.
After much tweaking and struggle I couldn't get the DBus working, hence couldn't install GNOME.
i3wm as my window manager and manual configuration of everything especially the wireless connection were too spartan for me. So I switched back to Debian 8 + KDE.
OpenBSD is probably the worst when it comes to overall performance of all the BSDs, and Linux.
And I have this superstition that if I leave my laptop plugged-in to any sort of cable at night, it might get hacked while I'm sleeping.
I'll try suspending the next time I install OpenBSD.
Or rather, mimics CRUX, which imitated BSD-style init scripts.