In this article is this paragraph:

"It took a while, but they listened. We replaced our monstrous 7,000 LOC socket server with a minimal, maintainable implementation under 350 LOC. This was a huge win, but I had become disillusioned by the process."

How can I replace my current 48,395 LOC of Javascript + dependencies with something more maintainable? Can it be similarly be replaced with 350 LOC ?