[geodel]

The people who worked on Java also worked on Dart after joining Google. You can guess where it ended up.

[SureshG]

Dart had an initial hiccup, but I think things started changing with flutter - https://github.com/flutter/flutter

[apta]

They're not in the same market. Dart faced competition from TypeScript (same designer as C#, and also backed by Microsoft), and the latter seems to have won so far.