dart2js is not just a feature to ease migration. It's the primary means of deploying Dart code, and will be so for a long time, even if/when the Dart VM gets into Chrome.

> It's the primary means of deploying Dart code

I'm assuming that you mean on the browser, or are you targeting dart => dart2js => nodejs as the primary means of server-side deployment?

Oh yes, you're right, on the browser. On the server there's absolutely no need for Node.js.