Because of volume, spam or whatever. Good luck dealing with it through Twitter, Facebook messaging or any of the new “web 2.0″ solutions.
They’re like the retarded little brothers of e-mail. Less controls, worse interface and poor or non-existent security and spam filters.
Email volume is a human behavior issue. It is technology agnostic. You can get a 100 emails a day or 10,000 twitters. You can have all the filters and rules you want to try to make things manageable. But no technology solution is going to fix the volume issue unless you consider nuking the world with an EMP to be an option. Doing something unpopular and ostracizing yourself from society would probably be the quickest way to solve this problem. Or going to jail. I hear email overload is not a problem there.
And is spam really a problem? I get tons of e-mails through various accounts and have never had an issue, except with Yahoo! Mail’s crap filter. Outlook’s filter isn’t great, but I’m only using that for corporate mail, and I believe there’s another layer of filtering that happens before it gets anywhere near my inbox. Gmail, especially, does a fantastic job filtering out spam, even with my junk address, it filters 99% of it correctly - which is impressive since 99% of the emails to that account are junk. Across the board, I have more issues with false positives than false negatives.
