Assuming that LLMs hamper gaining true experience and mastery of a language, and further assuming that LLMs will play a significant part in development (especially for juniors)… it seems to me that new programming languages and frameworks will have a significantly greater hurdle to overcome going forward, compared to what they faced in the past.
From what I’ve heard, German was still the go-to international language in academia until WW2, when it fell out of favor and US’ post-war boom took over. So it’s a bit more complicated.