For years now my favourite way to deploy my own 'side-projects' has been Dokku. It is like having your own Heroku on a single machine. Very neat, but no cluster

For years now my favourite way to deploy my own 'side-projects' has been Dokku. It is like having your own Heroku on a single machine. Very neat, but no clustering. Lately I have been playing with kubernetes and now docker swarm. I must say that I too find kubernetes to be too heavy (feature- and concept-wise) for the smaller scale things that I am up to: I have to read up too much, learn too many new concepts, write too many config files. Docker swarm is a lot more appropriate for scaling those side-projects to a slightly bigger step, however, I have concerns about the longevity of the project. Will Docker Swarm still exist in 5 years?