Earlier quoted context omitted.
The programmers who will find LLMs most useful are going to be those who prior to LLMs were copying and pasting from Stack Overflow, and asking questions online about everything they were doing - tasks that LLMs have precisely replaced (it has now memorized all that boilerplate code, consensus answers, and API usage examples). The developers who will find LLMs the least useful are the "brilliant" ones who never found…
How many of them are there of the latter type? In my 15 yrs of experience I would say 95%+ of all developers belong to your first category.
But not all younger programmers can be Stack Overflow cut-n-pasters, because not all (and surely not 95%!) programming jobs are amenable to that approach. There are lots of jobs where people are developing novel solutions, interacting with proprietary or uncommon hardware and software, etc, where the solution does not exist on Stack Overflow (and by extension not in an LLM trained on Stack Overflow).