I gasped when I saw this article at the top of HN due to the relevance of it right now in my life. I am currently working on a real monolithic jambalaya that suffers from a lack of documentation, architecture, extreme abstraction, rampant tight coupling and no previous source control.

Your point on performing architecture discovery and documentation is spot on. It has really helped me to strip away the mess and understand the flow of the logic and maybe even shine some light on the parts of code that are valuable.