The simple breadth of SW development suggests that you are right. I've worked since we were suing c and TurboAssembly for DOS apps. I have had great success creating very useful, robust systems but if you ask me a specific technology question, I'm likely to draw a blank.

What I like though is when recruiters ask me how much I want to be paid, I say that is their job. I'll code and they need to handle the business part. ... I usually get good answers of high offers.