Code Quality
How confident are you in your code? How difficult is it to add new features to your new application? How scared are you that bugs escape testing and make it to production?
These concerns are common, especially among existing teams with legacy applications. One of the biggest improvements team's can make to improve their code quality is to implement tools for static code analysis.
Unit testing is a fundamental practice to build a quality product. Using proper techniques along side code scanning in continuous integration, teams can increase their confidence in their application and develop new features quicker.