The answer seems simple but most people don't know by tangible measure the amount of work, output, effort, an action they create which is why it seems like he creates a lot ....to you. To me, we're both cars on a highway, he's just a ways ahead of me but I can see the color, make, the age of his car, passengers and the license plate.
say his "car" is a generation of skill better than mine, goes faster. He has also had writing full time longer than me so he can add in 8 more hours a day to it. His time to output is triple, like Star Trek warp theory. He and I both have writer ships and I can see his on the highway because I'm moving at warp speed relative to those not. But I'm at warp 5, maybe 6, he's at warp 9. Not just 3 points higher but squared to the power of multiples..... let's say for simplicity sake 6 is twice the previous, 7 is twice that and so on.
Channel 56 & 1996, also FIOS 34 and RCN 83.