Isn't that kind of the point though? 99% of the world's population aren't us. They're not early adopters or technophiles. They're people's mums, or dads, or aunties etc etc.
They don't want to root their phone. They don't want to install extra apps (beyond, maybe, Skype, facebook and twitter and the odd game or two). They especially don't want to clear application caches, or move programs to memory cards. They just want stuff to work. At the same time you don't want to spend Sunday afternoon on the phone to your mum explaining how to get the video of your kids off the phone and onto their computer.
That's what WP (and, to be fair, iOS) gives you. It's a phone that works as you want it to right out of the box. It's a smartphone that doesn't say "you need to be smart to use me".
If I can use an analogy; when I was young, I enjoyed tinkering with my car. I liked changing bits of it when they went wrong, or adding bits to make it more mine. These days, I just want to get in, turn the key and go somewhere. The car market has matured, and so have I. It's not a toy any more, it's a tool.
The phone market will undoubtedly go this way as well. WP isn't customisable, and doesn't have the option to fit an aftermarket metaphorical spoiler, or alloys. From that point of view, WP's problem may not be that it's old-fashioned, it may be that it's too far ahead of the curve.
Oh, and I'd recommend WP7 to someone, even though I wouldn't buy one, so I'm one of your 8%. I'll be waiting for WP8...