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If you had bought a succession of a 12-cylinder cars and then at some point the manufacturer decides to not offer a 12-cylinder engine in the next model, would you feel let down?

Your attempted analogy fails because the auto manufacturer won't be coming to your home to reprocess the old vehicle(s); it/they are still drivable. Apple is taking away features currently provided.

So are you not capable of using Flickr, Facebook, and the countless other online photo sharing sites?

By using some of these free sites, you give up all rights to your own photo. I remember reading a new story about someone's photo being used "without their permission" on a billboard. The photo owner gave consent simply by uploading the photo to facebook since they previously agreed to facebook's terms of use. I believe you also give up rights when using Picasa web. If I find the facebook story I'll edit this to add the link.

Also, at least with facebook, don't you need an account to look at anything? If so, you would be forcing people to create a facebook account just to view photos. Some folks simply have no desire to deal with facebook.

It seems to me the absence of those features will cause some people to defer buying new computers. Wouldn't the absence of those features make setting up a new computer--pretty much a piece of cake, right now--a more annoying, time-consuming process?

No. The migration assistant built into Mac OS has worked flawlessly for me several times. You need to have the 2 systems connected via LAN or firewire. Migration assistant copies your account and files and you can select/deselect things (bookmarks, files, key chains, etc) as desired.
 
Gallery was the best thing on MobileMe and the web for photo sharing. Nothing in iCloud excites me, but a lot makes my life more difficult eg Docs in the Cloud because I have a work computer set up differently to a home computer and i do not want them to be the same!

But the loss of Gallery is the worst thing by far.
 
The "journal" in iPhoto is the new iCloud based web stuff.
If you look in iPhoto for IOS you will notice an option to link your journal via a web URL. My guess is as soon as the new iPhoto for Mac comes out we will see this option there too.
 
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