Two things. Number one, I can't understand why "thin" is so damn desirable for a phone. I mean, up to a point - you don't want to carry a brick in your pocket - but they're already plenty thin enough for me.
As for the mini-jack, this is a problem for me. For one thing, I won't be able to connect the thing to my stereo, which is analog. Presumably, I'd have to buy a DAC, or some kind of wireless receiver, neither of which I'm planning on doing. Nor would it be convenient, perhaps not even possible, to use the iPhone with my truck's stereo. In my Peterbilt, the stereo, GPS, and other things are all integrated into one touch-screen display. It does have an interface to operate an MP3 player, but it's not designed for Apple devices, and it's a pretty piss-poor interface. It has no way to deal with podcasts, except as MP3 files, so I already have to work around that. Much easier to use the mini-jack and the Apple device's interface.
Here's another thing. I'm glad my old iPod "Classic" is still working. I looked at getting a new iPod, but the hard drive sizes are all smaller. As it is, I can't fit all my music on the 160 GB hard drive I have. Aren't we supposed to be getting more storage with newer devices, not less?
It seems people either love to bash Apple, or they're fawning fanboys, but here's my take after using their products for thirty years: Great products, (usually), bad corporation. I've always hated Apple, but I certainly wouldn't switch to Windows.