It's physically impossible
It's technically impossible
It won't be profitable <= You are here
It's bad for the environment
It needs to be nationalized
This is just a joke, obviously, but the debate over on ArsTechnica about Falcon 9 going away is all about how it needs to be nationalized.It's just far out research experiment like another commented quoted from the text: https://news.ycombinator.com/item?id=49834746
But even in this comment stream there are tons of people saying the cooling problem is insurmountable.
However, I do think avoiding local control (state/city permits) is a reason for this.
Not true