There’s always a “significant possibility” that something unprecedented will turn out to be infeasible with any particular approach. How could it be otherwise?

There’s always a “significant possibility” that something unprecedented will turn out to be infeasible with any particular approach. How could it be otherwise? Smart people have incorrectly believed we were on the precipice of AGI many times in the 80 years that artificial neural networks have been part of the AI toolbox. https://en.m.wikipedia.org/wiki/AI_winter https://en.m.wikipedia.org/wiki/AI_winter