Doesn't this break every policy the app store has about what programs can and can't do? This has full system access and every other app is constraint to the file dialog to get write permissions.
They can be distributed through the store but the onboarding process is much more arduous than with true UWAs (for which the Store acceptance process is largely automated since they're relying on the app container for security). AIUI to submit an unsandboxed app they expect you to already be an established developer and submit a request, wait for them to do a bunch of manual investigation of who you are and get back to you, etc.