With E* poor design and tech support I doubt they could put out an upgradeable model without sinking the company in lawsuits. But the pace of new technology makes it necessary to start treating their higher end consumer electronics as more in the computer realm, ie built on open standards and modular in nature to facilitate easy upgrading. After all the 721/921 have hard drives, internet connections, keyboards, USB, etc which is about as close to a Dell computer as you can get.. Both E* and D* are fighting to maintain proprietary control over their hardware as an edge in the subscriptions game. But they can't buck the computer world much longer. Witness the popularity of AVSforum.