http://f7rkl2pb2uwyyrw3mgaxstwig3nhpl25fhjdvoultpn4j56n3vkbgkad.onion
I would estimate that "literacy" here in the 21st Century, the ability to read and write, is at an all-time high all around the world, as so many more people today have access to written communication in various languages, with English being the most widespread, via the Internet and online world.
The most obvious huge disadvantage of physical written communication today is the ability to determine if what one is reading is true or not, since almost everything one reads...