I highly recommend reading "The Box", about the history of the shipping container.

Longshoremen literally retired early and were paid pensions out of corporate profits from container related productivity increases.

I read the book and that's not the first thing that comes to mind.

What comes to mind is whole towns made of dockworkers which disappeared, and some places like Manchester lost their port and their industry died too, and it took them decades to recover.

Of course, some other like Rotterdam flourished.

I do recommend the book, but I think it shows many sides of what happens when a large change happens.