> It's a fundamental problem of having a dynamic, compiled language. It's not possible to actually solve. There are plenty of Common Lisp implementations that

> It's a fundamental problem of having a dynamic, compiled language. It's not possible to actually solve. There are plenty of Common Lisp implementations that allow you to redefine functions or add methods to multi-dispatch functions without requiring you to recompile every use-site. There are other trade-offs here, but it’s not “impossible” to precompile and optimize code in a dynamically-typed language.