If DRM was unbreakable I'd still be ereading: DRM-free ebooks from publishers like Baen and Tor, and DRM ebooks from my local library.
But I don't think I'd buy any unbreakable-DRM ebooks, I would treat such a book the same way I do one that is not available as an ebook at all -- wait until it becomes available as an ebook without unbreakable DRM, or reluctantly buy the paper or audio version.
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