I work at a company doing full-stack Elixir with most of our devs all heavily using AI as they please to augment their workflow, and our CTO was genuinely concerned that our main competitor, a Python shop, had a leg-up on us for this exact reason.

He spent time running benchmarks for 0-1 apps and all kinds of other metrics and found basically no appreciable difference in the speed or accuracy of AI at generating Elixir vs. Python. Maybe some difference, but honestly it just doesn't exist enough to matter.