Last year I decided to exit the Kindle ecosystem after buying quite a few books in it, and cracking the DRM was a pretty near thing. I was lucky to have an older Kindle device sitting around that didn't support Amazon's latest DRM. It seems like they may be winning the arms race.
As an individual with a few hundred ebooks rather than an institution with millions of them, I'm a lot less concerned about losing my un-DRM'd files and/or the ability to read them, but I very nearly lost my entire ebook library just because I fell into Kindle's convenience trap. I've decided now to only buy ebooks that don't have DRM.