There's a lot more evidence that I hope to put into a blog post soon. No company will guarantee they will always make a product, but we've got years of enterprise support for Swarm as it is, and they keep adding functionality so I have no evidence of them stopping or even hinting at such a thing.
March 9th, 2018 Docker creates a blog post highlighting a major new feature coming to Swarm in Docker EE 2.0 (alongside K8s integration). https://blog.docker.com/2018/03/enhanced-layer-7-routing-swa...
There's a lot more evidence that I hope to put into a blog post soon. No company will guarantee they will always make a product, but we've got years of enterprise support for Swarm as it is, and they keep adding functionality so I have no evidence of them stopping or even hinting at such a thing.