[shykes]

Yeah, in general if you have a production system in place there's not much incentive to rip it out and replace it with something else - especially if your system is relatively new and shiny.

It becomes more interesting when a) your system has been running long enough that you've learned operational and design lessons that justify an upgrade, or b) you're starting fresh on a new architecture.

Most of the Docker community is made of these groups A and B. If you're starting from scratch, or if making significant changes anyway, it makes a lot of sense to federate the development effort and reap the benefits of code reuse, common tools etc.