Just an idea where it would be nice to have plugins that tap into the new API : in Windows Store apps, right now, I have to fake the notifications (small slide in window just the equivalent of Mac).
Desktop applications within a Desktop App Converter Appx wrapper do have access to the Windows 10 API though the bridge. I did get the API description, but I don’t really have time to spend doing this stuff. I would gladly pay to have a few of these functions as plugin.
https://docs.microsoft.com/en-us/windows/uwp/porting/desktop-to-uwp-supported-api