That’s very sad to see Docker Swarm declining. I run few production clusters, all are being set up via Ansible and Wireguard for communication. The setup takes only few minutes and runs perfectly fine. It's been running for a while and I haven't had any issues with clusters, as well as it doesn't require maintenance. While Kubernetes is great, it requires a lot of maintenance and setup isn't straightforward. Sometimes you don't need additional complexity and want things just to run and pretty much forget.