> When it comes to async. code, however, it’s a different story since you return promises in this case that are also chainable. So that's one issue. That's wha

> When it comes to async. code, however, it’s a different story since you return promises in this case that are also chainable. So that's one issue. That's what I mean by the interface being more complicated - void is void, but if you return something there might be some edge cases, some of which are difficult to predict. Personally I think it's not worth the trouble.