Given the facts on the search for AGI, which started in late 60-ies / early 70-ies of the last century of the previous millennium,
the ultimate goal is still a way ahead of our, human, remarkable efforts, directed to attack this goal.
While trying to avoid all kinds of the observation biases, what do you consider as a principal category, that represents a major progress-blocking bottle-neck for the overall success of the so far spent amounts of global human efforts, directed to the common AGI goal?
Let's use, as a principal categorisation, the formal list under the scheme below
and kindly name a reason, for pointing to such a category ( or naming another one, if missing ) that is, in your view, the most blocking one for the progress to AGI