I hate, hate, HATE that people still use this argument to deter people from switching from ATT to VZW.
Why? Why does it chap your hide SO much that people might possibly use this as an argument? Are you personally hurt every time someone decides to go with AT&T instead of a CDMA carrier?
I mean, how often do you REALLY find yourself needing this feature?
A LOT. While I have a very nice office with a very nice high speed data connection, there are days where I'm not there, because I'm out in the field troubleshooting a network or checking on a project's status. Often times I'm on the phone with a network operations center, and they might e-mail or text documents to look over. If the network where I'm at is down (which is usually the reason I'm there in the first place) my only recourse is to either receive the info directly on my iPhone, or tether it to my MacBook Pro to get something done that way. If I had to hang up the phone to receive that stuff and then call them back, sometimes multiple times, doing what I do would take a lot longer, and would be aggravating for everyone involved.
If I had a separate wifi hotspot, sure, but I've done that before and it's a pain in the neck: one more piece of equipment to carry around, charge batteries for and possibly lose at a site, and an extra $60 a month to pay whether I use it or not.
I could also get a Droid I guess, but... no. Two radios sucking down my battery, and this huge beast I can't comfortably put in my pocket? No thanks. Dual radios for SVDO is an inelegant kludge that requires the user to make sacrifices for a network technology that has fallen way behind in capabilities.
I've also been in conference calls where it's useful to check my echange e-mail or dropbox as we're talking.
Which is by the way,
another reason I prefer AT&T: conference calling with up to five people. No need to pay for some outside conference calling service. I just do it from my iPhone.... but I couldn't do it on Verizon or Sprint.