Honestly, I feel the opposite -- I feel like this project acts as a far better rebuttal to some common misconceptions about systemd than Lennart's blog post about systemd myths. Why isn't systemd portable? You could read Lennart's explanation, or you could just look at all the things these guys had to rip out in order to get systemd to compile (and then not work) on non-Linux kernels.

I think we are mainly in agreement. This was a very informative project.

Now, in my case, I happen to have furthered my distrust of systemd in the process. But that is secondary to just having learned more about what exactly is involved by looking at this.