Probably a reason. Also a lot of middle/upper class people were leaving cities in the US.
Bike messenger services also were a big thing in cities a few decades ago. Email (and probably general acceptance of electronic scans) replaced a lot of shuffling around of paper documents. I was sort of amused a month or so back, when I had to do some financial transfers, a lot of the paperwork that would have formerly involved going into an office and getting notarized stamps could now happen with a combination of a phone call, mailed paperwork, and phone verification.
