Sadly it drags the whole debate into an argument over semantics. Yes, it is not monolithic in the sense of one binary running everything. But at the same time everything ties back to systemd running as init.

This in effect makes everything under the systemd umbrella tightly coupled. Can i run journald on its own, or logind, or resolved, networkd? As long as the answer is no, they mays well be one big blob.

And it is presented as such as well from a source point of view.

http://www.freedesktop.org/software/systemd/

There is no separate tarball for udev, journald, logind, or any of the other *d's that make up the systemd project.