It's obvious that it's hard now, but at the time it was much harder to coherently argue that THIS was the mode shift of the progress chart. An S-curve just loo

It's obvious that it's hard now, but at the time it was much harder to coherently argue that THIS was the mode shift of the progress chart. An S-curve just looks exponential from the bottom. It's not until you hit the flattening part of it you see where the limit is.