It’s a bit of a shame really.
I kind of knew this day was coming really, but it’s still a shame nevertheless.
Whatever anybody thought of MacOS Server after Mac OS 10.6, it did eventually develop into an easy to use and pretty rock solid basic server, with just enough function for SME when carefully configured.
Personally I use it on an old, but still rock solid 2009 20-inch iMac running 10.11 as a general home server. I mostly use it for VPN when in places with public WiFi, but also to sync my contacts and calenders across devices, and obviously file sharing.
I appreciate Apple providing these open source alternatives, but in ll honesty I doubt they’ll be anything close to the “click and go” that Sever offered me - I really don’t want to have to do my day job when at home.
RIP Server. You were well loved. At least by me anyway.