150 years ago, decent literacy alone made you managerial material. 50 years ago, people were in the middle class screwing nuts on bolts. Today, literacy alone qualifies you for nothing and if you are illiterate, your prospects are dim indeed. Manual skill manufacturing is a minimum wage (or below minimum wage) job offshore. Typing used to be a middle class skill for women.
Imagine being a dev 20 years ago. I think many would be scared of not having work in a world where you can stand up beautiful reactive sites and deploy them worldwide in a day. AWS, React, GitHub actions, etc. All could be reasons for predicting mass unemployment.
Instead, there are more of us than ever.