What N8n Taught Me About Better Script Architecture

I recently started using N8n, and something clicked. What I love about N8n is deceptively simple: I can pause at any step, inspect the output, and rerun it. All previous steps? Already done. I can see the input and output for every single node in the workflow. As someone who's been programming for almost 20 years, this felt good. And it got me thinking: How can we achieve the same thing in…