> at age 20 I had read maybe 10-20% of what I've read since, but I was capable of reading comprehension and conversation...

This is because human intelligence is not just language, but lot of indirect context, "software" inside spinal cord (and other non-cortex parts of brain), and even human body itself.

But as I know, current LLMs working in plain flat structures. At the moment, nobody tried to use even neocortex-like structures, not even considered artificial spinal cord.

All these looks like, to teach table lamp, or something similar smart.