>The need which will drive new OS adoption is security.
Yet Microsoft XP/7/8 are arguably the most insecure operation systems, and the BSD flavors are arguably the most secure, yet have the lowest adoption rate.
People don't care about security they care about usability and simplicity.
But this is at odds with your previous observation, that BSDs have low adoption. They are vastly more simple than typical linux distros, a fact that linux users complain about when trying out a BSD system.
Yet Microsoft XP/7/8 are arguably the most insecure operation systems, and the BSD flavors are arguably the most secure, yet have the lowest adoption rate.
People don't care about security they care about usability and simplicity.