I did the Angular 2 TypeScript quickstart this weekend, and it bothers me that it relies heavily on Decorators, which are an experimental feature in TS (https://www.typescriptlang.org/docs/handbook/decorators.html).

I also recall there being around 30 issues for Angular 2 Final on github milestones the day they announced the release, but they were mysteriously gone in the afternoon.

Angular 2 Final seems to be anything but.