Although the rebooting is indeed "by design," it is not simply because the XNA is pre-beta, and we do know the reason why it does this.
Quote:
|
"When you are actually playing the game on the Zune, when you're finished with the game, the Zune has to reboot itself. This is done for music protection, DRM reasons."
|
Quote taken from
this video, around the 5:30 mark. The video makes no indication that this unfortunate side-effect will be removed in any future versions.