"The goal is to make the users the beta testers"
And that's another mistake - startup rarely deliver products that becomes instantly something a lot of people rely on for their everyday work, so they can deliver early and fix later, if their idea is really game changer and deliver something unavailable before, most early adopter will bear some rough edges.
While mature and successful product (for any meaning of successful, being on most desktop/laptop count as success) becomes tools which people need to rely upon - and there aren't only larger companies which can use enterprise licenses and patch deployment tools, there are lot of smaller one and professionals using the Pro (and sometimes even Home) versions. And nothing delivered lately justify the lack of reliability - there's no game changer feature.
Thereby the whole MS approach to Windows is something built on a pile of bullshit, and a total lack of understanding about how to develop and maintain such kind of product - just aping a different model which apply successful to wholly different products only.