Original Message

is not a vetted history book. It's a completely anecdotal statement. Just forget about comparing elevators and helicopters. It's ridiculous.

There are no autonomous buses. Not even in "Venezuela". lol

Like I said, those trams are not trains. They operate on very small and completely closed systems. Because it's on a track doesn't make it a train. There will be no unmanned helicopters because it will never be safe. It's not going to happen.