I think it all depends on the horse you ride.
My finished Tennessee Walker needs nothing- you just jump on and he's right there, ready for anything and reads your mind instantaneously. But he's my boy.
Currently training my Belgian/Paint cross in Dressage, and those moments of complete unity are bliss... and far in between haha. But that's the fun of training. Anyways, the real purpose of training is to eventually get your horse to that state. A very green horse will take hours, maybe, and a finished one only 5 minutes :)