I think future visitors of the page may want to read this:
Reason is in my honest opinion the true sentiment of the original claim and the push force of frequent recurrent revival is that: yes, Julia semantics are inherently dynamic but everytime you need performance (which is a very strong selling point for the language), you need to make sure the actual behavior can be devirtualized, effectively reconciling with static overloading.
Ideally I would post this even under the celebrated YouTube video (The unreasonable…), but YouTube has no good facilities for screenshot embedding or nice external link rendering 