I recently 'downgraded'...
Last week I bought a Nokia C5-00 for 120 quid. It syncs my contacts and calender with Gmail. I can access my Imap. It has fairly decent GPS navigation that, and this is important, doesn't require a net connection, and is free. Battery life means that I don't need to worry about charging over a weekend. It is small, compared to most smartphones and happily resides in a pocket. It even has a built in SIP client.
Yes, if I needed to send email left right and centre and make sure I can browse easily during the very limited time I have not got my laptop within walking distance, it would be a pain. As it is, it is a bloody great big relief.
I know that this will not suit everyone, but I suspect that there are a majority of users out there with a smartphone who seriously do not need one. We are connected via digital leashes to our virtual online personas for what reason?
There are a lot of things that were easier on a smartphone, (I used android and webos, webos was nicer...), than on the Nokia. Shame they didn't pour some decent resource into Symbian. But, at the moment I do not miss having the POTENTIAL bells and whistles. I can live without angry birds. Honest.