You're not going to get anywhere with this line of discussion.
Speaking as someone who shares your concern, particularly in emergency situations where full stoppage occurs, I'd advise you to not waste your time discussing this.
It has been argued over and over and over again, with the prevailing opinion being that all will be fine (it likely will) and a few of us expressing our concerns. Hopefully they'll be unfounded.
But arguing back and forth doesn't solve anything. Until it's built and we see real numbers, it's just back and forth back and forth.
I do find it interesting that they are providing wifi to the cabins per Lift Blog, but I'm guessing this is actually provided on the lift towers and not within the cabins themselves, so power concerns and discussions would not come into play.
My biggest surprise is Disney is killing off bus service entirely for these resorts to Epcot and DHS, removing scheduled alternative transportation.
Maybe the Minnie Vans will pick up the slack for the ECV users who can't drive quick enough into the gondola or for those afraid of the heights or having irrational fears of being baked to death in their own terrarium in the sky...?