Comment by chc

Even technology-wise, a lot of the knowledge you got 10 years ago could still be applicable. For example, as a result of having learned webdev in the '90s, I actually know how to manipulate the DOM and work around cross-browser issues even when jQuery isn't available, which it is my impression a lot of professionals have no clue about these days. Similarly, I learned Objective-C and Cocoa about a decade ago, and I know others with grayer beards than mine who learned it almost a decade before that — I would say that experience is actually more valuable in the modern development landscape than it was back then.