Comment by mickeyp

All this lather about doing it the UNIX way, whilst neglecting to point out that the old tooling was far worse. "Do one thing well" implies it was done well to begin with.

DNS: Can you from memory recite how name lookups work on Linux? Ever had t otrack down problems with non-standard setups? `resolvectl` is not perfect, but it does let you control all of this stuff in one place, and with a nice, orderly view of what does what.

Init system: ever written the old sysV ones from scratch? Sure they're just shell script, but did you remember to make yours re-entrant? What about forking or master-slave processes? Hope you got your pid checking code just right...

Containers: Docker is quite robust nowadays but it's not like it follows the 'UNIX philosophy' either. And systemd/nspawn at least lets you do namespacing and cgroups reasonably well and in a straightforward way...

Mounts, etc.: let's not get into fstab and its idiosyncrasies.

Logging: let's hope you set up logrotate properly or you're in for a surprise.

And on it goes.

Systemd is not perfect. But what it replaces was god-awful and far worse.