The problem is that most tasks require general intelligence at some point. So the question is more: given that in the vast majority of cases, weak-AI cannot go

The problem is that most tasks require general intelligence at some point. So the question is more: given that in the vast majority of cases, weak-AI cannot go from "0 to 100%" how much should we care? The whole "the sky is falling" schtick i think requires weak-AI systems to be getting very near 100%s reliably across industries. Anything even 90% and we're talking more about assisting and empowering users than replacing them.