> So logically, if AI can help us complete tasks 2-100x faster than before, we should be UNDERWORKED and experiencing ZERO burnout, right?

No. you got lied to by AI bros. 100x times the code (that if you burn enough tokens that you could actually hire someone to go thru your ideas and make them...) is not 100x times the productivity

That's not the reason, the reason is that you get paid for eight hours, and that's how much you'll work, regardless of the number of tasks you complete in those hours.