I've had DirecTV, and I'm fairly sure that my esata drive added to the space, not just replaced it. But either way I disagree with your conclusion. If you plan on having a lot of receivers fail and having to have backups of all of your recordings, then it would, indeed, be a handy feature. But if that's expected with Dish, I'm not sure that's a good thing, you know? DirecTV has lots of hidden fees and their customer service is among the worst of any company I've ever dealt with (both of which are the reasons I switched), but I never had a receiver or DVR fail on me, not once in over 6 years of service.