Flutter is one of the fastest growing frameworks for the past two years and therefore dart too. It most likely will succeed cause of this pace and the community growing around it.
When flutter for desktop lands into beta I think it will pick up even more pace and would be very hard to ignore for a lot of companies.
But how will you give the same level of performance in a dynamic language? Typescript is only for type safety. It's still JS at the end. Dart is more modern with a VM during development and AOT compilation for production.
When flutter for desktop lands into beta I think it will pick up even more pace and would be very hard to ignore for a lot of companies.