Hi Istvan, check out nosh. It explicitly states systemd compat as one of its goals and goes to great lenghts to make it happen.
: https://jdebp.eu/Softwares/nosh/ It preserves the daemontools style and spirit. Meanwhile, while hordes of programmers are busy making everything fit into the systemd-world (and fixing bugs they've created in the process), a bunch of hackers behind Void Linux made everything tick on top of runit without all that much effort. : https://www.voidlinux.eu/ <3,K.