Part of it is that we read about "breakthroughs" in diverse fields only to see nothing come of them. Past experience creates valid doubt. Also, as exciting as t

Part of it is that we read about "breakthroughs" in diverse fields only to see nothing come of them. Past experience creates valid doubt. Also, as exciting as this might be, we are nowhere near a practical application. Overall, I'm glad there are still points of excitement and we haven't come to a halt.