So while Arch ships everything, and being Arch it doesn't really have a default, its recommended networking system isn't systemd-networkd but rather netctl, which is basically everything systemd-networkd should have been.
`netctl` was explicitly written because systemd didn't have a network daemon. The past 3-4 years the community has in general recommended against using `netctl`.
It was never removed from the ISO because the releng maintainer didn't put that much thought into it, but I'm happy to tell you `netctl` was replaced with `iwd` on this month ISO release.
