Sure you can be productive as a single developer. The problem is when you're handed a project from another single developer-project, and the project is a hot me

Sure you can be productive as a single developer. The problem is when you're handed a project from another single developer-project, and the project is a hot mess of spaghetti jQuery where business logic is intertwined with DOM manipulation. It's basically impossible to work with unless you've created the code yourself.