AFAIU antirez is mostly writing in C, a verbose language where "create a hashtable of x->y" turns into a wall of boilerplate. In high level languages the length diffrence between a precise specification and the actual code is much smaller.

He also mentions using it for Python which is minimal boilerplate.

And he didn't limit his take to just C code. He said: state of the art LLMs are able to complete large subtasks or medium size projects alone, almost unassisted, given a good set of hints about what the end result should be.