That's a good point about the synergies, something like eg. a type system that's expressive enough to be Turing-complete is going to have some effects. You're right that it might just feel like a "kitchen sink language" due to complexity of the features it has, but then again I suppose it's sort of one and the same where a language's complexity comes from.

But it's no Swift, at least; now that language really does have everything and the kitchen sink.