Exactly, my first reaction was "I should write a blog post about why I still use Docker Swarm". I deploy to single node swarms, and it's a zero boiler plate solution. I had to migrate services to another server recently, and it was really painless. Why oh why doesn't Docker Swarm get more love (from its owners/maintainers and users)?....
I moved us off docker swarm to GKE some years back. The multi node swarm was quite unstable, and none of the big cloud providers offered managed swarm in the same way they offer managed k8s.
It's a shame I agree because it was nicely integrated with dockers own tooling. Plus I wouldn't have had to learn about k8s :)