don't flame me for saying so, but WM does far more than iPhone is capable of. It's also infinitely more customizable via registry edits and many of the best apps and hacks are simply given free despite the time developers spend on them.
Having owned a Treo 750 and a Samsung Blackjack I totally agree with your statement. Yes, you can make a WM device do more and you can do more hacks with it.
The problem is that of all the things I've seen a WM device do, it does them all
very poorly.
Sure, you can edit Microsoft Office documents, and I did so when I had a Treo 750. I can't say I enjoyed the experience, nor did I actually produce anything productive, or that didn't require serious cleanup on an actual desktop before sending out. Contact and calendar sync was also a chore, especially if you have a solution in place other than Microsoft Outlook.
The same I've found true for most of the other features. A lot of times they felt kludgy, had bugs, or I otherwise didn't feel safe relying entirely on my WM device for something.
I also disagree that WM devices are more stable. 2.0-2.0.2 did give the iPhone quite a black eye in terms of crashing and stability, but even then, there is a huge difference in experience between an iPhone app rash and a WM crash. With an iPhone, if the app crashes, oh well, back at the home screen you go, and you can often relaunch and pick up where you left off. With Windows Mobile, my phone crashed a
lot, and every crash involved the
whole phone, forcing a reboot whether you wanted to do it or not. On WM, there were times when I found myself having to muddle through the day with an inoperable phone, having to go back home, reset the device and re-sync to get my data back.
To me, that goes way beyond "just being pretty." And it was mainly because of my poor experiences with Windows Mobile that I had decided (until the iPhone) not use a smartphone for contact or calendar organization again. Even the Blackberry I used since then was solely an e-mail and phone-only device the way I used it. And a bad experience on a Blackberry where it started deleting all my e-mail slowly over the course of several hours kinda soured me on that platform, too.
After the WM fiasco, it took several months for the iPhone to gain enough trust from me to go back to using it as a calendar/contact organization tool. Though the ability to have my stuff synced across multiple computers and on MobileMe was a big help. This way I know if ever the iPhone does bail on me for the day (which it hasn't at all yet), I can at least get to a computer with web access and regroup.