Off-point. Lambdas are different, in the sense that with such functions you 1) need to think about the closure of the function 2) might need to reconsider what

Off-point. Lambdas are different, in the sense that with such functions you 1) need to think about the closure of the function 2) might need to reconsider what part of memory will be executable (you certainly don't want an executable heap). The change here is in the other direction - you remove a feature that is easily swapped with a builtin, which is implemented in terms of other already existing language features.