What I meant is that "if designed for interop" in the case of numbers is something like "there is no design for numbers, just use the host's numbers", that's no

What I meant is that "if designed for interop" in the case of numbers is something like "there is no design for numbers, just use the host's numbers", that's not a very interesting design. And it leads to, for instance, huge differences between Clojure and ClojureScript (as you note).