For those who were online in 1993, did you ever think we would see websites with over a billion pages. That billions of people would login to one website, run by someone they do not know or do business with, every day as a means to communicate.
Or were you thinking someday the web would have billions of websites. As I remember it, the size of the web (cf. internet) was always measured in number of websites not pages.
The obsession with "scaling" seem to presume that the web is not destined to be billions of low-traffic websites, each with its own login.