I think part of what made it great is the time slot that it was available in. The only people listening to radio that late at night were people driving in remot

I think part of what made it great is the time slot that it was available in. The only people listening to radio that late at night were people driving in remote areas. If you were at home you had the tv, if you were at work you were busy. If you were driving at 1am, you had Coast to Coast. So it wasn't just the content, it was the content + being alone in the dark, in a vast expanse somewhere. You can't do that anymore because everything's replayable, not bound to a time slot.