I welcome anyone to pick a random JavaScript app, port it to Dart, and write up their experience. I'm sure the community would love to learn more about that experience, especially me.
I don't have access to anything you don't. Dart is open source. Heck, in my job, I don't even write Dart code every day. :)
I even reported issues about the original Music DNA app (bugs, code quality) to the original author. I helped make the original Music DNA app better.
Can you help me identify the false conclusions?