I think reasonable people can probably agree that there is a difference in kind between CoffeeScript and TypeScript. CoffeeScript was functionally equivalent to JavaScript, whereas TypeScript has feature-level improvements that are worth a developer's time. Sure, TypeScript is pushed by Microsoft. It's also an excellent solution for large-scale systems, its adoption is nontrivial, and Microsoft has a history of supporting its tools (Managed C++ aside, I suppose) in a way that can offer a promise of consistency on its own.
Microsoft has also been doing a good job of keeping TypeScript aligned as JavaScript++ by absorbing ES6 features into the language. I was initially worried that TypeScript would be a fork of JavaScript and eventually diverge enough that it was painful to use, but there aren't any signs of that happening yet.
I don't mean to imply it's dead, but I think it's safe to say it's resting? I haven't heard of new development being done in it in a while, and its time in the spotlight certainly seems to be over.
