Last Friday, the Ember project merged RFC #0724: Official TypeScript Support, committing to make TypeScript an officially-supported language for Ember.js. To make that a reality, we also need to have a team dedicated to maintaining Ember’s types and its TypeScript compiler integrations.
Happily, we already have a group of people who do that! For the last five years, Ember has had community-driven TypeScript support, led by the past and present members of the Typed Ember team.