The number "60%" has been spread around like a virus, but it's not true. _Any_ amount of uptake will help. The more the better obviously, but any uptake helps.
Now there are two problems: In UK, people who rightfully are wondering why their government has to record everything and store it for twenty years, protected by the most unprotective woman who the could possible find for the job. And everywhere, the paranoid who don't trust an Apple with an API produced by Apple and Google (when it is common sense that if these two companies wanted any information about you, they would have it. If you don't trust your phone maker then you might as well move to some remote island).
Biting the hand that feeds IT
