I'm not sure about MacOS, but otherwise all major OSs today can run containers natively. However, the interest in non-Linux containers is generally very very low. You can absolutely run Kubernetes as native Windows binaries [0] in native Windows containers, but why would you?
Note that containers, by definition, rely on the host OS kernel. So a Windows container can only run Windows binaries that interact with Windows syscalls. You can't run Linux binaries in a Windows container anymore than you can run them on Windows directly. You can run Word in a Windows container, but not GCC.
[0] https://learn.microsoft.com/en-us/virtualization/windowscont...
I wouldn't think there are many use cases for Windows, but I imagine supporting legacy .NET Framework apps would be a major one.
Is there any limitation in running older.NET Framework on current Windows? Back when I was using it, you could have multiple versions installed at the same time, I think.
You can, but there are companies that also want to deploy different kinds of Windows software into Kubernetes clusters and so.
Some examples would be Sitecore XP/XM, SharePoint, Dynamics deployments.