A final shot to the head for a twitching zombie
I'm not sure why Apple chose to make the world watch as it slowly strangled the server app to death over years. Maybe it was just laziness and cheapness, not wanting to task enough people to port the parts they were keeping to standalone apps or back port them to the older OS versions. If that's the case they can join M$ in the DGAF club with the two settings interfaces.
We bailed when they started hiding the older features on newer OS versions. If you upgraded an older server then you still had all the menu Items active, but if you installed a fresh copy, no services for you. We realized that that made a bare metal restore scenario way to problematic a mess to risk in a clinch and retired everything but the OSX file shares. Cause when an old box dies, who wants to add an hour of hacking together an unsupported config on new hardware that won't happily take a direct restore of the old server image?
Now all we use is the cache service on an old mac mini. We'd have happily spent the money to keep most of those services alive if Apple wasn't negging us so hard. Funny that they sell rack mounts for the new pro towers still. All they had to do was release the individual services as apps in the store and people could have installed them on whatever recent version of OSX and mac hardware they pleased. Then they also could uncouple them from their OS teams release schedule, and they could be patched individually without taking other services down. Easier, cheaper, and a better solution for everyone. But nope, not the Apple way.