With every release, the need for testing the features in that release is imminent. The more frequent the releases, the more the need for testing - not just the new functionality but the existing functionality as well. All this means additional work for the key business users, where they are manually testing every time. Using AL Test automation framework (available in D365 Business Central), the need for repeated manual testing goes away. 100s of automated tests execute in a few minutes, any number of times - resulting in passed or failed test cases. Saving productive time for the key users!