BB users are also a strange lot. The ones I know at least tend to be very conservative about their equipment choice. Hauling around 6 or 7 year old BBs because newer ones move the icons around or they don't like the keyboards or what have you. They want exactly the experience they have right now and nothing else. I've known a half dozen who bought and returned both Androids and iPhones (trying to get with modernity a little) pretty much because they weren't BBs...or at least all of their problems with the other two phones were why this or that wasn't like it was on their BB.
This has been a very big problem for Blackberry. They invest in finally modernizing and updating their hardware and software, but everybody who's not already a BB user has moved on, and the ones who've remained don't want the new stuff because it's not just exactly what they already have.
Their only chance would have been to capture the non-conservative parts of the market before they left years ago. That boat set sail long ago.