the main difference of UT compared to others is that it's open source. That's also its unique selling point. If you want something without a business model behind it, you choose open source.
A business can have nice values and beautiful products, but a business is meant to be a money maker. To pay salaries and create income. Open Source communities are gathered around values and not for profit.
Products engineered, maintained and created by communities of users, designers and makers are better products in many ways. Knowledge and experience of all stakeholders are inherently included. The open structure makes it flexible and rapidly adaptable to user-whishes and ever-changing cultures.
If something is the story of UT, its open source character must be the story.