First of all I am connected 24/7 with my N900.

Second of all, if the value for mobile users was non existant, why would every major device - including the N900 - have this option? Why would most mobile service provides offer their own push services for business users?

Not only that, but some devices boast their push abilities as a selling point - Blackberry for example.

For me its simple, sometimes I reply emails the very instant they arrive with short answers. I exchange several mails during one mail conversation in a matter of minutes. As the recipients of my emails often have push on their devices, responses arrive promptly as well. Some people check mail several times a day, while others treat it almost as IMs.

Now, I understand you don't need it, but this doesn't help me in any way. I asked a question with this thread, if you don't know the answer, please don't reply with "you don't need it". Just ignore it.