You can and must understand computers now! - Ted Nelson

In order for something to Catch On, it has to be standardized. Unfortunately, there is motivation for different companies to make their own little changes in order to restrict users to their own products. The best example of how to avoid this: Philips patented its audio cartridge [i.e. the standard audio "cassette"] to the teeth, but then granted everyone free use of the patent provided they adhered to the exact standard. The result has been the system's spectacular success, and Philips, rather than dominating a small market, has a share of a far larger market, and hence makes more money. That's a virtue-rewarded kind of story.

Everybody has only a 24-hour day. Most people, if they increase consumption of one medium (like magazines or books) will cut down on another (like TV). This drastically reduces the sort of growth some people have been expecting.

[Of the web] It's massively successful. It is trivially simple. Massively successful like karaoke - anybody can do it.