I'm a bit surprised that the DMA etc. didn't end up applying to Xbox, and how Microsoft has tried to make implausible arguments about how iPhone should be open but Xbox should be closed.

The killer app for jailbreaking game systems is and has always been running unlicensed games, a scenario which Apple, Xbox, and Nintendo vigorously object to. It's also why Sony killed Linux on PS3. On the other hand, you can run unlicensed games on Android and it hasn't killed Google Play.