I loved my Blackberries, and hung on to the last one as long as possible. I think I had to give it up around 2012... but even within the Blackberries, there were differences. Some keyboards were better than other, or at least, suited me better.

Having said that, I am not sure they could have withstood the app revolution without participating in. I do think they made major mistakes in their strategy at critical points, but simply focusing on their core business demographic might not have been enough. The get corporate IT on board, IIRC, you had to run a Blackberry Enterprise Server (?) for security and corporate connectedness. This was not cheap. That was becoming increasingly problematic as the iPhone and Android infrastructures caught up security-wise. In the end the cost to maintain the Blackberry servers was no longer justifiable as many people wanted the shiny new phones with all the apps.