LLMs massively compound the advantage of existing popular languages, namely python. Any new learner will find it infinitely easier to use sonnet 3.5 to overcome the so called '2 language barrier' for python, while the lacking data for Julia becomes the real barrier.

This issue will remain until LLMs get so smart they can maybe self-iterate and train on a given language. By then though, we'd likely get languages designed and optimized for LLMs.