How might workplace reforms have altered marxist predictions of world revolution?

Marxist lived in a world where most employees were unskilled factory workers, today that is not the case for the most part. Since the supply large, the factory owners didn't have to treat them particularly well, so Marxist predicted that they'd have the incentive to revolt and the numbers to succeed. Now, in the developed economies, most workers have significant education and skills and knowledge have been getting more important, not less.