> I think it would be great to be a junior dev now and be able to learn quickly with llms.

I'm not so sure; I get great results (learning) with them because I can nitpick what they give me, attempt to explain how I understand it and I pretty much always preface my prompts with "be critical and show me where I am wrong".

I've seen a junior use it to "learn", which was basically "How do I do $FOO in $LANGUAGE".

For that junior to turn into a senior who prompts the way I do, they need a critical view of their questions, not just answers.