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.
Rust: the last programming language.
It also helps that it’s very strict, both in syntax and borrow checker. A normal person needs 6 months to stop fighting the compiler and start coding proficiently. LLMs stand no chance.