You have to remember that just because a thing can theoretically be achieved, doesn't mean that we have the motivation to do it. We still don't have any planes

You have to remember that just because a thing can theoretically be achieved, doesn't mean that we have the motivation to do it. We still don't have any planes as fast as the now-shuttered SR-71, and that thing was developed 58 years ago. We have had electric cars for nearly 200 years, and they are barely starting to become mainstream. The technology for an elevator has been around for thousands of years, but it took tall buildings becoming more common for somebody to both imagine a simple enough mechanism, and see the market for it. There has to be a large enough will and force applied for technology to become reality, and even then it might die on the vine. AGI would only ever be possible in our lifetime with a new Manhattan Project, and even then it would take sooo much longer than nuclear science. Commercial software development today is just laughably bad. Only slightly better than it was in the 1970's. The only thing we have going for us today is processing power, and it's still at least a century away from having the kind of raw power to brute-force compute the kind of probabilities to even accurately predict the weather. Reproducing the cognitive ability of a 5 year old is still a very long way off. It would actually be significantly faster to develop AGI by just mapping a brain. Sort of how autonomous driving is developed today; just run the stupid car on the streets for a billion hours and end up with a gigantic statistical model that you smooth out by hand, rather than trying to make a pure algorithm that can drive correctly in any situation.