Docker was made for development and testing of code, not production. It has been co-opted for production with good success. It seems fine to do it for hobbyist projects, but still feels dirty in a commercial setting.
The largest internet services on the planet were using LXC containers for production ops before you ever heard of the term 'docker'. In its earliest iterations it was easier to push a container to production than to run it on your laptop.
From what I recall, spotify were the first company with a large footprint to use docker. However for some reason they skipped VMs and went screaming into docker when it was _very_ new. Personally that seemed like a mistake, but you know, each to their own.
If you're wanting to get into a bun fight about containers, then IBM 360 and JCL has some time for you.
I'm using docker in commercial environments for years and cannot complain... But I don't distribute software, which is where the problem is probably more visible.
