I hit line 1000 in my little Python project at 2am on a Tuesday and just sat there staring at the screen. That file was a mess. One giant loop nested inside another, no functions, and I had been copy pasting the same 8 lines of code all over the place. Breaking it into smaller pieces and fixing my messy loops took me two more nights, but now the app actually loads faster and I can find bugs without scrolling for a minute straight. So where did your first project fall apart, and did splitting it up save you or make it worse?