When you are building a tool, how do you measure the success of your efforts? There are data driven approaches around adoption, like number of times your tool has been downloaded or installed. Similarly, success could be defined as how effectively you solved the problem. This could be measured by the number of issues filed, the (hopefully) lack of vulnerabilities, or the number of feature requests created. But, in any measure, success is actually defined by other people. And, as an engineer, it's such a difficult task to put yourself in their shoes.