Daron Acemoglu, an M.I.T. economist, says he is no “doomer” when it comes to A.I. But he has his doubts about its potential.Credit...Cody O'Loughlin for The New York Times Despite the advent of personal computers, the internet and other high-tech innovations, much of the industrialized world is stuck in an economic growth slump, with O.E.C.D. countries expected to expand on aggregate just 1.7 perc