I am not trying to convince you: Use whatever you want.I am trying to explain it, so that people can have a more informed discussion. The web is full of either systemd is the best since sliced bread and systems is horrible. It is neither: It is just a technical system that made technical choices that make certain things easier or even possible and others harder or even impossible.
The sytemd time thingy is actually more minimal than openntpd: It only supports sNTP and not the full NTP protocol and is a client only… Openntpd is a full NTP implementation with both client and server. It also is a great technical choice, so keep using it, especially when you need an NTP daemon.
You behemoth is my plumbing layer:-)
I like the ton of small and simple tools that systems brings along: systemd-nspawn is a really lightweight way to run containers that works basically everywhere, no need to install docker or podman. Disk resizing, sysusers, tmpfiles, boot, Key Management, homed, etc. enables me to build reliable, immutable images for my systems. There is no tooling whatsoever for this outside the systems umbrella.
If you do not try to build a 1980-style UNIX system, then you basically are stuck with systemd. Nobody else is even thinking about how to move forward. If you try to raise the challenges you see outside systemd, you get laughed at and are told that your usecase is obviously stupid. The limitations admins ran into 1980 are gospel now and you may not question any of that.