I simply cannot understand why Kindles no longer have buttons. They are clearly a better page-turning mechanism than the touch screen.
It's too bad that Barnes and Noble's ecosystem (free books, emailing books to your account, lending library, etc.) was and still is so inferior to Amazon's. Amazon has yet to produce hardware anywhere near as good as the Nook Simple Touch model created over 3 years ago. But clearly, the ecosystem matters more. I'm using my Kindle while my Nook gathers dust.