This is a good argument. But that is not a market where majority Python programmers are. Once the wrappers are done, for most developers, it becomes the matter

This is a good argument. But that is not a market where majority Python programmers are. Once the wrappers are done, for most developers, it becomes the matter to layering those build blocks building their own functionality. It is not a strong enough argument that people should use Julia because it is a better language to write wrapper. Let alone that Python wrappers for data science stuff is already like a de-facto builtin. Not saying Python is perfect, but IMHO, Julia is not hitting the right spot in order to really stand up against Python.