That lesson was learned. Since two years ago, Microsoft Store can (and does!) have Win32 apps in it. At the most basic level, it can be just a simple download link, so the Store is only used for discovery. But you can also "package" desktop apps so that they can actually be downloaded and installed from the store, as well.

https://docs.microsoft.com/en-us/windows/uwp/porting/desktop...

For example:

https://www.microsoft.com/en-us/p/itunes/9pb2mz1zmb1s