Last time I tried to get into Blackberry development, I could not get the SDK or development environments to work at all. If they can't be bothered to make a quality cross platform SDK and development environment then I can't be bothered to code for their platform. Ever try to code for Blackberry OS with a Mac? Sure you might be able to get the SDK running but when you launch the emulator... wait... what emulator?! Oh you need a Blackberry Torch plugged into your system to do any sort of testing! You need a huge investment in money and time to even fiddle with the development environment and see what you can create.
If the developers don't have your back then you don't have a platform - you have a crappy handset with mediocre software that no one is excited about.