> Microsoft has had a walled garden.
No it doesn't. I have never purchased anything from Microsoft. 90% of the software I have purchased is straight to the vendors (e.g. InternetDownloadManager, ACDSee, etc.). The remaining 10%, even when it comes to Microsoft products (OS, Office), I purchased them back-in-the-day from stores, and I got the CDs/DVDs. Same with computer games. AoE, Diablo I-II-III and expansions, and many more.
I know that M$ tried to pull everyone through their (imho) crappy Store, but still, I can get everything I want/need outside their marketplace and straight from the Devs, bypassing their store. Unless the Judge strictly means the mobile app store, in which case, I exited WM6 a 10+ years ago and have no knowledge of this.