Not all 10x programmers are created equal.<p>Some of them leave a disaster in their wake. They&#x27;re fast because they&#x27;re sloppy, and don&#x27;t take the time to refactor their new code into something maintainable. The team pays the price for that later.<p>I&#x27;m not suggesting John Carmack is one of those bad 10x developers, but they do exist. Just something to keep in mind.