Frankly, I don't care about DRM for fiction. I generally only read fiction once, anyway (and donate the paper book afterwards).
For technical books it's a different story, but then the Kindle is not a medium that works well for diagrams and special formatting that you would expect in technical writing.
So in the end, Kindle DRM does not hurt me much. Then again, it is so easy to strip that I think Amazon does not care, either. It's just a pacifier for publishers.
There's a 3rd category: non-fiction that doesn't necessarily require diagrams. For this category, ebooks are great in the sense that I can add highlighting and notes very easily. For me this is the largest category of books and so DRM scares me. It also scares me that the highlights and notes are not owned by me. I wonder if I can somehow retrieve all of them?
For technical books it's a different story, but then the Kindle is not a medium that works well for diagrams and special formatting that you would expect in technical writing.
So in the end, Kindle DRM does not hurt me much. Then again, it is so easy to strip that I think Amazon does not care, either. It's just a pacifier for publishers.