For me, who's never really known a world that has been changing at anything less then exponential speed, it is so easy to forget that even now, it is not like this for everybody. I am incapable of understanding on a gut level a world where change is slow, news is from last month, and adding 1,000,000 numbers together is impractical because even if you take the time to do it, your result will be too full of error to be useful.