[scoot]

The multirotor you cited has a no-load hover time of about 15 mins - hover n/e forward flight. It has a loaded flight time of about 5 mins. Like I said - pick one.

I didn't say wind, I said weather. That said, forward flight in even moderate wind draws considerably more current.

The motors are open for cooling and weight efficiency. They aren't waterproof. Try flying in snow, or dusty / sandy environments and see what happens!

If GPS accuracy randomly ranges between perfect and nonfunctional, then you have described unreliable. Please cite all these alternatives.

What do you imagine might happen if one were to 'brake the motors below a certain altitude'?

And I didn't say 'can't be made', I said the technology isn't there yet, nor by 2015 as Amazon suggest. I also said it will be eventually.