I went on vacation last month and my phone didn't stop, because everything the team needs lives in my head and nowhere else. I keep meaning to write it down, but there's never time, so I stay the bottleneck. If I got hit by a bus tomorrow, half of what we do would walk out the door with me.
More people experience this than they realize.
Everything you know lives in your head and you never pass it on.
If this sounds familiar, the Library can help you find the bigger picture.