Great news!

When you have routers with 4/8MB of flash like mine (or the majority of domestic routers AFAIK) it's really difficult to use anything more complex than a simple init system (and when I say simple, I am talking something like Busybox's init, not even sysvinit). You can't even use glibc there (and I think systemd only compiles under glibc), you need lower overhead C libraries like uclibc or even musl.

But yeah, for everything else systemd seems to be the thing to use. I would really like to see a working implementation of systemd driving Android, but this seems unlikely since Google doesn't like GPL.