I would argue that enforcing, or at least favoring, immutability and the ability to trace data flow is more helpful that static types. You could have both, but

I would argue that enforcing, or at least favoring, immutability and the ability to trace data flow is more helpful that static types. You could have both, but I know which one I would rather give up first. (actually, in the best of all worlds, I would want optional [compile time] types as well as type inference)