[hansvm]

TS is an interesting example to pick when trying to argue that types are better. You have all the same downsides people pick on when arguing against strong, static typing, but since the type system isn't sound you still can't rely on the input to a function being the type you expect (and the problem is worse anywhere you inevitably interact at least a little with the JS world outside your TS bubble).

At best it's a form of documentation that enables some simple linting rules and a bit of jump-to-definition magic. Like, that's a benefit (mostly -- I tend to think that type signatures implying more guarantees than they provide is a recipe for inadvertently relying on falsehoods), but it's not as clear-cut of a win as you see in other statics/dynamic tradeoffs.