Too little, too late.
I used to have BB handsets. First through work and then my own.
I bought the wife an original iPhone and she hated it - the things it couldn't do outweighed, for her (then), the things it could and the BB platform blew it out of the water. But when things like being able to trivially connect to an Exchange solution and apps were introduced for free, the rot started to set in for BB.
Their ((BB) handsets started to drop tremondously in quality whilst their prices remained high. Their lack of simple support for push mail or sync calendars unless you had an Enterprise class backend infrastructure, were the beginning of nails in the BB coffin.
Yes they were inherently more secure than other handsets available at the time but things like apps and usability of droid and iphone were even more of those nails in the coffin.
I don't know if they particularly are any more (as in I genuinely don't know). but I can remotely wipe my devices using various tools from free to paid for, for example, and my solutions are built to be secure from the outset but they may still have layers not available elsewhere.
Anyway, I guess my salient points are that they rested on their laurels for far too long, churning out the same old stuff on hardware that was looking ever more dated whilst the world, it's dog and other manufacturers got on with trying to produce stuff that people might actually both want and use.
Of course there's a contrary argument there now that would go along the lines of said manufacturers have stopped that and are now getting on with trying to sue the f*ck out each other while world + dog looks on bemused and wonders when we'll see some more innovation again.