It's supposed to be for devops, but in practice developers use docker as a way to solve dependency management on the server more so than to seperate instances of apps from each other. Especially with "microservices" it makes more sense to have docker available on the server and allow each team to upload a image with all the deps already baked in.
Yup. The tradeoff is that in operations we then need to work around all of the inherit disadvantages of running docker containers (network slowness, disk slowdown, logging, etc) to keep their systems performant.
