&gt; Developers who deliver 10x as many features inherently do so at the cost of maintainability<p>I don&#x27;t think what you say is completely true. People who are more experienced tend to be able to produce features much more quickly than those who are junior, just because they&#x27;ve already run into issues before so can anticipate them or solve them more quickly. If anything I would argue people like that actually write code more quickly that is more maintainable.<p>I don&#x27;t know if he can ship 10x as many features; I didn&#x27;t think term 10x engineer was used literally. I just know I&#x27;ve worked with quite a number of people and he is one of the best developers I know.