I've been wondering if this is cultural or technical. The things that are easy to do get done more, and thus the tech (and how well it's designed) shapes mass behavior and culture. On the other hand, where there's a will to do something, a way will be found, or created...
A great example is sending Flash holiday greeting cards in the email. Watching them with my mom is one of my favorite computer-related childhood memories. Yet they seemed to go out of style long before Flash did.