You know it’s not a single binary, right ? Systemd is a bunch of different, mostly single usage, mostly optional, binaries. As far as Unix philosophy goes, Systemd is definitely following the principles, which is not the case for the Kernel for instance.

As for the binary logs, I used to hate it, but then, not having to manually parse logs for filtering is really nice.

I do have my issues with Systemd, but it not following the Unix philosophy is not one of them.