I'm not sure I'm following. Isn't this argument applicable against Docker as well?

No, Docker on Windows can make use of Windows containers, and also interoperates with any kind of Windows or macOS application.

In what way does docker on macOS interoperate better with the rest of the system than a nix package? I'm pretty sure the answer is going to be "none" – you can build native, including UI apps with nix (not that I recommend throwing away xcode for your app store development and switching to nix). How do you do that with docker?

I'm less sure about windows, can you explain a bit more how you use docker containers for providing "native" windows stuff (as opposed to as a more lightweight linux VM replacement when developing something that you really want to deploy on linux)?

For example deploying IIS based applications, including some Windows services and COM libraries.

Thanks, I wasn't aware of this.

Out of curiosity, why are you using docker containers on windows? For emulate static linking or to provide network/process isolation (and does docker under windows provide "proper" i.e. secure isolation?) or something else entirely?

Configure a couple of application servers from scratch and manually configuring the services starts to get tiring.

Usually the traditional option would be to snapshot the VM right after the first successful install.

However stuff like Windows Nano now makes it interesting to start playing with containers on Windows.