Eve Marder has an opinion piece up in which she discusses the "luck" involved in career outcomes.
Our present world is filled with great angst. Our junior faculty are writing too many grant applications for not enough money. Our postdocs rightfully feel that they are in purgatory, not knowing when and if there will be an academic position for them, should they desire one. Our graduate students are watching the struggles of postdocs and faculty. For me, this era is especially frustrating, because it is a time of extraordinary opportunity for scientific discovery, and it is criminal that our young scientists can not experience the excitement and challenge of scientific discovery without being worried about their futures.
There is no right answer to the question of how long a talented scientist can or should remain in a ‘looking for a job’ limbo. Every individual must take into account their own ambitions and circumstances as they try to answer this question. And all of us should also be aware that we have the potential to be successful in many careers, in and out of science.
Go read (and comment).