[freeqaz]

This is the complexity introduced when applying static types to a vanilla JS codebase, imo. It's easy to get crazy with types in vanilla JS. Adding Typescript forces you to resolve the different types explicitly and it can get hairy.

What this really demonstrates to me is the difference between starting with TS vs migrating to it. Code that has to think about the types the first time it is being built is going to be better structured, on average, than purely dynamic code.