You can put out a lot more code when you're starting from a blank page than when it has to integrate with thousands of lines of existing code. Not to mention th

You can put out a lot more code when you're starting from a blank page than when it has to integrate with thousands of lines of existing code. Not to mention that at the start there's basically no refactoring, debugging or rewriting target, so you can just pump out new code. Whether 1500+ LOC on a weekend is realistic is another matter.