The Road to TypeScript

What does the road to official TypeScript support for Ember look like? What does it include, and what does it exclude, and why? Why has it taken this long? What does the future hold? What have we done which is distinctive from other frameworks? What are some of the possibilities for collaboration across the front-end ecosystem in this space going forward? PUBLICATION PERMISSIONS:
Original video was published with the Creative Commons Attribution license (reuse allowed). Link: https://www.youtube.com/watch?v=UOw7TydAT_s https://www.youtube.com/watch?v=S__L5U1xKwY