I appreciate the retrospective on the hurdles you faced. Could you share some learnings for things that did work? I could tell you spent a lot of resources getting the onboarding flow correct (Visual Studio Project Import was nice!), anything related to onboarding-related learnings you can share?
You cannot convince developers to use a tool with just words. They need to experience the benefits first hand. And getting to the benefits should happen as fast as possible after starting to test the tool.