You know you’re doing a great job when, adding new functionality to a code base, and you wind up removing more code then you’ve added. Less is More.
I once heard boast a programmer that he’d written million lines of C code. That seemed undesirable to me. Better you should boast that you’ve written an entire system in under 1,000 lines of code.
Doing more with less, requires good design and a lot of reusable code. Doing more with less means you have less to maintain, and less that can go wrong.
So pride yourself on how small your code base is, not how large it is.