Had a startup in this area, with swarm under the hood, and realised last year (when RackSpace closed Carina) that 1. swarm is loosing momentum due to the ammount of new features, stability and native cloud integration that k8s brought; 2. containers are beeig adopted at a huge speed, and big cloud providers like aws and gce have lots of users and trust, so the effort of offer CaaS is not that big, with great chances of success; 3. The hosting market is tough due to comprtition. DigitalOcean was in this market way before they were caled DO.; 4. When you want to make money from OSS like Docker does, companies like RedHat and IBM allready have years ahead of competition due to their established sales channels (in 1-2y from now we will see tectonic in all rhel powered companies, and docker announcing that it’s not supporting UCP any more)