I downloaded the iPhone SDK in March 2008, whilst on vacation in DC. After working with it for a few months, I quit my job, but in that case, I'd written a few

I downloaded the iPhone SDK in March 2008, whilst on vacation in DC. After working with it for a few months, I quit my job, but in that case, I'd written a few non-trivial programs and knew writing Objective-C and Cocoa code was what I wanted to do. Sure as hell beat writing business software and teaching C# to business grads, though anything is fun if you're determined to enjoy it. Total pay cut, maybe $160k and rising. Yeah, still the right decision, though money has been tight. The key point is that I had a solid grasp of what I needed to do technically to survive after quitting, and I was not jumping into the unknown, just the not yet done.