This has more to do with egos, including mine, than technology. I'd prefer not to have anything written by, or influenced by, Poettering because I don't like the way he operates. Same goes if Seivers, and a number of others.
My love affair with UNIX started back in the 1970s, after reading Kernighan and Plauger: Software Tools. The elegant way the tools fitted together, each doing just one thing really really well, but combining to be tremendously powerful, was entrancing.
All this died with Linux really, because the Kernel has become one enormous monolith, if Hurd or one of the other micro-kernels had succeeded we could have been in a better state. Yet systemd is a terrible init scheme, and I rebel against binary logging, but it's in the same stable as Linux (and Android, OSX, and NT) - monolithic. I hate monoliths (as Kubrick demonstrated).