Each method only had tiny differences but spotting them, as pivo's original comment argues, is a total nightmare.
Refactoring brought it in at 1,500 lines. Now you can glance at any method and see the actual difference to the default that they do.
Are you seriously suggesting there's little difference between a programming language that encourages 20,000 line behemoths filled with dross compared to a concise 1,500 line program. That there's not a massive mental overhead to reading through what is essentially a book compared to a short essay?
As that's what's being discussed, but you don't seem to get it.
There's reading code, and there's reading pointless code.