I wrote my first typescript this morning. I was trying to do something weird in React Native, which I've also never used before. I was getting red lines all over my editor. Saved. It hot reloaded anyway and ran the code and such. The errors I was getting were pretty inscrutable. I think that's the nature of untagged unions maybe? Anyways, it didn't actually put up the hard wall I'd expect a type system to do, and with that I wasn't in a dialogue with the compiler to get the types working and thus the program.