Then you didn't have to mantain a system of any kind of complexity.

And you have? Can you give an example and how you solved it? Thanks! (edit: not trolling; curious)

I think my issue what binding Consul to docker0 while Docker is starting. Half the time the interface wasn't ready. I don't remember exactly how I fixed it but with SystemD you can just specify a dependency.

I think I had one where one service was trying to bind to a network interface that wasn't ready, maybe docker0. It was painful to find and fix.