Comment by danenania

If they focus on the core features and make a significant enough improvement, perhaps the core TS team could be convinced to pull it in as a native extension and make calls to it for the operations it covers? If something like 62x improvement is really achievable, it's hard to imagine the team not being interested at all.

I would personally be very happy to use a significantly slimmed down subset of TypeScript if it provided a 62x performance improvement. Slow type checking is currently the main drawback of TypeScript development in large projects.