Well, you seem to be dissagreeing, then agreeing with me, which is fine. I don't know where your 30 year deadline came from. Betting against the accuracy, efficiency, scalability and lower cost of our tools hasn't historically been a smart move, and I don't see why that would change. It's easy to envision a scenario where you could pay n times as much for an artisan plumber (or ... Bicycle Repairman!). But I bet most would opt for the cheap, standardized service of a tele-op'd Mario9000.