Coding will not be done by juniors anymore. We are quickly progressing to humans no longer needing to learn machine langauage (syntax) and computers better developing code by interpreting human languages (english).
Teams will be led by one subject matter expert, and fulfilled by thousands of agents. I would not be advising anyone under 21 to become a "coder". Studying computer sceince still has value, but coding was the lowest hanging fruit for LLMs.
Once we can do LLM code reviews with high confidence and little error, coding is essentially a dead field.
The closer you are to atoms and further the way you are from bits, the better off you will be in the coming two decades as AI progresses