Comment by HarHarVeryFunny

You could say there is no fundamental barrier to humans doing anything that is allowed by the laws of Physics, but that is not a very useful statement, and doesn't indicate how long it may take.

Since nobody has yet figured out how to build an artificial brain, having that as a proof it's possible doesn't much help. It will be decades or more before we figure out how the brain works and are able to copy that, although no doubt people will attempt to build animal intelligence before fully knowing how nature did it.

Saying that AGI "just needs some different code" than an LLM is like saying that building an interstellar spaceship "just needs some different parts than a wheelbarrow". Both are true, and both are useless statements offering zero insight into the timeline involved.