[habeebtc]

I've gotten hired twice via a linkedin "Stumble Upon" type process, but not used it to apply for a job (successfully, anyways). I typically have done that with the recruiter or company directly.

I don't switch jobs that often. My career has been at only 4 companies over 20 years so far.

I agree with other comments here, your LinkedIn profile is useful for showing people what you're about and what you can do at a high level. I know people who don't have linkedin because they are in-person networkers. They go to conferences to build relationships, and when they need a new job they work that social network that they built into their "little black book" by hand.