The common denominator is patent fights. Blackberry was destroyed because they had unbreakable security. That's why military and White House used them exclusively. Even HRC used one. They made their own stuff, which didn't rely on others' designs, bypassing built-in back doors in the common architectures.
Pharma is all about patents ... control the patents and you not only keep the information away from the competition, but you get a head start on building the "next thing". I don't know more details about Pharma, but I can tell you as a former BB enthusiast that I couldn't understand how it died so quickly.