Hi all, I work on the TypeScript team. There's already a lot of feedback on the issue itself from users urging the authors not to make this decision, so I will hold back from adding to the noise on that issue. Every team is entitled to make the decisions that they feel are best for them, and I don't think it'd be productive to change anyone's mind in this case.

Instead I'll just mention that I always welcome thoughts on some of the challenges teams encounter when writing in TypeScript. It helps make the language better. If there's anything you often hit, you can comment here, create an issue on the issue tracker, or reach out to me at Daniel <dot> Mylastname <at> microsoft <dot-com>