This is funny from where I am standing.

Yes the rate at which you learn in your first 10 years is dramatically higher than any of the years following. That's becuase of the steep learning curve.

Get over yourself. You don't and should not be learning that fast as you get older and more experienced. Nothing in this programming universe has changed that dramatically in the last 20-30 years. What you learn is different. Your eyes start to see things you never saw before.

I can say that after 30 years programming, it wasn't all rose covered lawns all the time. Every persons career path is different and diverse. But I am far better programmer after 20 years than I was in the first 20 years. By miles, and getting better as my vision improves.

Find a way to make it work beyond the 15 year mark where most give up and become crappy managers, thinking they know it all. They don't they were just waking up when they quit the tools.