The alternative is to break all existing compatibility, loose nearly all existing ties with established software publishers (by enforcing a 30% cut from Windows

The alternative is to break all existing compatibility, loose nearly all existing ties with established software publishers (by enforcing a 30% cut from Windows Store), and gain nearly nothing at the very end. Do you really think somebody will ever write a single app for this all-walled-garden, dishonest effort? The current success of Windows relies on its openness. Add a walled garden and get a dysfunctional, slowly dying OS like macOS.