[KronisLV]

> Docker is the killer app feature keeping me on Linux.

Agreed.

Docker (or another OCI compatible solution) feels like one of the few good ways to run software with all of its dependencies consistently across different systems/OSes: you can generally develop things on macOS, Windows or Linux and run your containers with reasonable amounts of confidence in everything working as expected.

No longer must you worry as much about what the host OS will be for your business webapp to run, nor are you tied down to an old OS version just because of some dependency not being present/working on the latest one, or even need to worry as much about updating the host with the potential to break something (at least something other than the container runtime).

That said, it's always nice to have a decent amount of choice regarding the host OSes and see more support! Even other runtimes like Podman feel like a good sign.

Note: some of the aspects of containers have drawbacks, of course (and certain things can break due to FS differences, for example), about which I wrote on my blog, "Containers are broken": https://blog.kronis.dev/everything%20is%20broken/containers-...