Ground your confidence in how you work, not in what you currently know. Knowledge based confidence is a trap, and it gets more dangerous the better you get. You learn a stack deeply, you become the person everyone asks, and your sense of being competent quietly fuses with that specific body of facts. Then the company changes direction, or the tool is replaced, or you move teams, and your confidence walks out of the door with the thing you knew. You have seen this happen to people with fift...