Systemd fans are always saying that it's not monolithic but consists of many executables. So how do I replace any of them with my own, small tool? They have no stable interfaces. There are quite a few complaints about them [0] and yet nobody was able to write a replacement.

[0] https://news.ycombinator.com/item?id=42889878, https://news.ycombinator.com/item?id=42889792, https://news.ycombinator.com/item?id=42886965, https://news.ycombinator.com/item?id=42897105

See also: https://wiki.gentoo.org/wiki/Hard_dependencies_on_systemd and https://news.ycombinator.com/item?id=42918448