Every year at DockerCon, there would be flashy announcements that went nowhere. As a developer, those years from 2013 to 2017 were both super exciting and super frustrating. Everything started falling apart when Docker (the project) got split into Moby for open source and the rest went commercial. Docker started to sell Docker Swarm (the original), only to kill it a year later with a new Docker Swarm (what we have today). Then, Kubernetes started growing traction, leapfrogging both Docker Swarms, Mesos, and others in adoption. They never had a cohesive commercial plan. Just lots of empty promises and burned bridges.
When I think of Docker (the company), I feel bitter about all the projects they killed in their attempt to own the market. I love using Docker (the software), but the company's just one big disappointment.