I personally think AROS ( AROS Research Operating Syste ) is pretty cool. Same with just the basic Amiga Workbench 3 series ( the only one I have any experience with ).

Obviously Amiga Workbench isn't daily driver ready, but neither is AROS since it's, from what I can tell, just an Amiga OS passion project trying to make a more modern more open source Amiga OS.

Alpine. It’s very lightweight.

I use Gentoo. I install systemd willingly. We are not the same.

macOS. I find it to be the least inconvenient for most of my needs.

It's either Slackware (Linux, no systemd), OpenBSD or NetBSD.

True story: I install a Red Hat server with a disk shelf with about 12 SAS disk in it. Red Hat has systemd. Everything works fine for a month.

One (1) disk out of the 12 fails. No biggie. Shutdown the server cleanly. Replace disk. Flip power back on. Rebuild disk config. Simple, right?

Wrong. You see, systemd is unhappy. It detects a new disk. It has lost a previous disk. And so, it refuses to boot. Period.

Yes, there are ways out of this. But that was the day I decided systemd was the down of the devil.

In terms of Linux, either Devuan sysvinit, Void, or Alpine.

I am also a fan of BSD.

Probably PalmOS.

FreeBSD.

And you can run Linux stuff just fine.

Windows 7

systemd is great

There are few system manager (single project or a mix of components) that use linux features efficiently and none have dev resource remotely comparable to systemd. That's why in practice systemd is the best system layer implementation on gnu/linux. Android and chromeos userland (upstart derived) are not exactly (freedesktop) gnu/linux.

EDIT: the post ask which OS though. Including userland I like android a lot, but I would say illumos distros (OI currently). illumos has a system management similar to systemd (contracts in place of cgroups for example). Actually systemd was heavily inspired by SMF too.

🤔Windows 🤣