sure tech has changed alot, certainly not denying that; 20 years ago mobile internet was something only for eggheads and nothing like what we have today. "under the hood", automobiles have changed more in the last 15 years than they did in the previous 50. there's tons of examples of that sort of thing. self driving cars, wireless connections to everything, etc.
my point was more in terms of visual cues.
if I look at a group photo from the year 2000 and from now the only thing that would really tip me off as to when each was taken, would be if there were more people with exposed tattoos and piercings.
maybe I'm just not paying attention to the subtleties as much as I used to
