No physical buttons, no purchase.
replies(2):
None of the later version have peeked my interest, because I don't gain anything, compared to my 12 year old Kindle. Prices have gone up, but I've lost the physical button, so I pay more to lose a feature I really like.
Amazon could have more or less stopped Kindle development in 2012 and just worked on reducing the cost ever since and it would still have been a great e-reader.