re: If your younger self time traveled here, what would surprise him?

Yeah, I think hands down the smart phone has to be the winner. I remember as a kid having the brilliant idea in the late 80s of a digital phone book that would be like a little word processor next to your home telephone, where you could type in the inquiry and it would give you the phone number of whoever you were trying to get.

Hell, just the fact that long distance calls are free would have blown my mind. I remember being excited when the 10-10-321 etc numbers came out. Wow! Ten cents a minute for a long distance call? I could call friends who had moved away & talk 20 minutes & it would only cost $2!