For example:
>They're going down a road where I don't want to follow.
What road exactly is that? Anything concrete, or simply you don't like the Mac UI anymore? Because the "lock-up" things are just BS. There's nothing you cannot do in a modern OS X that you could in OS 10.1. The App Store just makes it more convenient, and sandboxing is optional.
>I don't intend to use whatever comes after Mountain Lion -- not that they even talk about OS X any more.
They don't? Last time I checked they had two Keynote presentations about Mountain Lion, which was released half a year ago. And they announced IIRC that they OS X will be released in an annual basis. Plus, they released several new laptops with some state-of-the-art features (hi-dpi displays) in the last 10 months and the redesigned iMacs. And yes, those are meant to run OS X.
>But, I'm stuck. All of my music is in iTunes, having been re-imported from the original CDs over a period of time. I can just re-rip all of it on my Linux box, but that's going to suck. Or, I can try to grovel around in their grungy database and try to make sense of it and "export" things, but I'm sure that will be even worse.
What exactly will be worse? Just copy the files over. You can even arrange iTunes to put it in nice folders based on album/artist for you. The mp3 metadata will still be there, because it's in the file. You might lost some data like "scores" and "recently played" but the same would be true with any player, open source or not. There's not a standard format to interchange such things.
>Another problem is going to be iPhoto. I've cropped, rotated, geotagged, sharpened, level-adjusted, and done countless other things to my thousands of pictures. They all also live in some database which is effectively opaque. While there's probably some way to get it out, it will be far from trivial.
Really? Because I find it quite trivial. Just drag the bloody images out of iPhoto and to the desktop. Or "export". Or use one of ten utilities to help you with the process and offer more control. Or write a ten minute Applescript.