For all the potential power of GPT-4, If it cant "learn on the go"... can't permanently incorporate new knowledge based on current conversations/inputs... remember things and use those as part of generating responses to things, going beyond the extent of its original data... then its not going to be much of a general intelligence.
Looping that is trivial. What if it convinces someone to run some code that hacks his computer, escape the sandbox (by bootstrapping itself) and running in "live" loop?
