A Google search for
ebook DRM removal will take you to the right place in the very first page. Repeatedly. So, yes, it is easy to learn how to strip DRM.
A simple look at the DL count at the primary distribution site reveals download counts in the tens-to-hundreds of thousands. By contrast, there are tens of millions of ebook readers, generating billions of dollars in ebook sales each year.
And, finally, looking at Amazon vs epub market share tells you nothing about who cares about DRM (and interoperability) in the US. What does tell you something is the aggregate market share of generic ADEPT ebokstores. Which is well under 10% and made up primarily of Kobo and Sony.
Look to other similar categories: Audiobooks? Dominated by Audible. Comics? Dominated by ComiXology.
http://www.the-digital-reader.com/20...ic-dollars-go/
The masses don't *care* about DRM.
(Only us hobbyists, techies, and crusaders.)
And that is with a strong migration of avid readers in the US to ebooks. With most US ebook growth in the near term to be driven by casual readers on iOS and other multipurpose devices the fraction of people who care about ebook DRM is going to be even lower.
As long as publishers and authors cling to their security blanket of DRM, nothing is going to change because the consumers simply don't care.