The idea of focus has huge benefits. Focus and the art of saying no are keys to greatness. However, you only succeed if you focus on the right thing. “Enterprise” is not the right thing. It’s not a valid target. Enterprise support is a feature, not a product. I don’t mean that as opinion, but as a point of fact. Focus on a set of customers whose only characteristic is a job description is missing the whole point of focus.
RIM’s problem hasn’t been focus. It’s execution. They need to ship a truly great phone. That’s it.