I’m quite deep in the Apple ecosystem and have been for nearly 15 years now 🙂 I just recently started to code some smaller things like Swift, though, and so WWDC finally got interesting for me 😅
As far Amazon: I can get most books also via Morawa.at or Thalia but if an ebook is only available DRM’d then I pick the Kindle-version simply because Adobe DRM is just so much worse than anything else I’ve had to deal with. In this particular case, though, I went with Amazon because my local bookstore told me that they weren’t even sure that they’d get it. I try to avoid Amazon but sometimes it’s just too convenient 😣
Video games I at least try to get on gameware.at first.