Electronic de-evolution

Have you noticed that all the new electronic forms of communication seem to be 'pushing out' the older forms?

The telephone call started the trend of fewer personal letters, but E-mail put an end to almost all personally written mail. I don't know the last time I got a really long handwritten letter from someone, but this used to be a really important form of communication.

Blogs seem to have replaced diaries/journals.

Now facebook and other social sites have comments that seem to be pushing out e-mail and blogging.

There's not any real point to this, just an observation.