[derefr]

You're presuming that the same company develops and deploys the software. My company runs many third-party Docker container-images in production—precisely because a Docker container-image is the only format that software comes in.

[pmontra]

I've seen ops accepting to run a couple of services on Windows and Linux at a time they were all HP-UX and Solaris. There were no good alternatives for those services so ops were not happy but had to learn how to operate those servers. Can I suppose you went through the same?