This sounds like they were going for a Roslyn analogue (using Dart to generate Dart the same way Roslyn uses C# to generate C#). Definitely a big time investme

This sounds like they were going for a Roslyn analogue (using Dart to generate Dart the same way Roslyn uses C# to generate C#). Definitely a big time investment. It's a big bite to chew, but I think Roslyn has paid big dividends.