There is still a lot of hard manual (and underpaid) work left that AI and robotics sadly did not replace. Instead it seems to go for the jobs some people actually might enjoy first.

I feel online platforms like the Fediverse are a conceivably bad place to discuss this, though. Because I assume a lot of people here do work in technical jobs they often enjoy at least a bit.

But a huge chunk of people works in delivery, in warehouses, at assembly lines, as cleaners, in construction, the not so nice parts of elderly care, etc. etc.

Factories employ a fraction of people they did before the 80s.

Depends on the industry. Automobiles? Yeah, that has been largely automated. Trailers? The most common trailer brands I can think of are still built manually.

CNC machines still need operators, and those operators are still doing manual labor. An entire factory only needs one guy on a computer to manage all the programing those CNC machines need. Everything else is about making sure the material is correctly positioned and the machine is working correctly.

Manufacturing isn't nearly as automated as you might think. Not as many industries have adopted the rote programing robotic arms that you're imagining from some Ford production line.

Plus factories and industrial are only a fraction of the manual labor world. Agriculture, construction, forestry, trades, all sorts manual labor jobs exist that have nothing to do with factories. And that's not even counting other unskilled labor fields like the service industry.