Yes, but that's a good thing. .d.ts files are reasonably straightforward to write (the external vs internal module thing is the exception), and easy to share on

Yes, but that's a good thing. .d.ts files are reasonably straightforward to write (the external vs internal module thing is the exception), and easy to share on DefinitelyTyped. But that only happened because TypeScript requires .d.ts files - the requirement pushes the community forward, with benefits for all.