I believe you are confusing the conclusions from the original paper with the claims from this paper. I think this is the case because this paper removes TypeScr

I believe you are confusing the conclusions from the original paper with the claims from this paper. I think this is the case because this paper removes TypeScript from their dataset entirely: "4.1.2 Removal of TypeScript. In the original dataset, the first commit for TypeScript was recorded on 2003-03-21, several years before the language was created. Upon inspection, we found that the file extension .ts is used for XML files containing human language translations. Out of 41 projects labeled as TypeScript, only 16 contained TypeScript. This reduced the number of commits from 10,063 to an even smaller 3,782. Unfortunately, the three largest remaining projects (typescript-node-definitions, DefinitelyTyped, and the deprecated tsd) contained only declarations and no code. They accounted for 34.6% of the remaining TypeScript commits. Given the small size of the remaining corpus, we removed it from consideration as it is not clear that we have sufficient data to draw useful conclusions."