I remember as far back as when fax machines were first introduced and I don't ever recall anyone expressing the thought that they were a waste of time. Fax was a welcomed business tool. I remember articles in NYTimes and WSJ proclaiming the business efficiency of fax transmissions.
Fax machines became a real pain when people learned how to use them to SPAM others with advertisements. And it literally took an act of Congress to provide recipients of that SPAM an effective tool to fight back.
Now newer technology has rendered fax machines much less an effective and efficient tool.
Many if not most blogs are a waste of time. Some are great uses of time and technology.
Maybe Twitter will have its time and maybe it's 15 minutes of fame are about to expire. Who knows.
What I have observed is that some people who like Twitter really like it - to the point of being emotional about it.
Like I wrote above: