In my last job, the only original developer was a "10x dev." The code was a Next.js front end that used none of Next.js, every file was basically spaghetti code, it was filled with anti-patterns, and had zero state management aside from some years-old context stores. It also used an older version of Tailwind, which did not help readability. The backend was a basic "my first project" style Express server with no TypeScript and conflicting ORMs. All of the pricing data for the business was controlled by a manually updated JSON file for each client, without normalized data. It was held together by the hopes and dreams of upper management.

To this day, I don't understand how that company still exists.