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Article: ESSAY: BlackBerry's Collapse - 5 Key Mistakes
#1 and #3 are real.
#2 was their test ground for OS 10.
#5 was related to #1.
This is the same thing that's happening w/ the iPhone. They got comfortable being #1, and android blew past them. It will also happen to Android - i can already see it. They are getting a bit too comfortable and not innovating fast enough. I consider this, or the next 6-12 months their "peak".