I am a Linux user, but I don't really know how most things work, even after years of casual use on my Main, I just started getting into Devuan and wondered then, what exacly does systemd do that most distros have it? What even is init freedom? And why should I care?
So is systemd. It is definitely modular and I think it has multiple interfaces as well. I’m not sure if you have configure systemd modules like GRUB does.