The author of the article created a small side project, mammoth.js, which converts Word documents into HTML, and believes it has had more positive impact than their decade-long career in the software industry. The project was initially created to automate a task for colleagues and has since been used by others, saving them time and effort. The author wonders if it's possible to earn a living from the project, but notes that they don't push for donations and the project's maintenance is not a priority. The article reflects on the impact of small, useful projects versus larger, more ambitious ones.