Re: If we're talking about actual AI, the number of jobs lost is zero
"It may impact publishing if a bookshop can do in house POD of one copy for $3, but the mass market would still be volume 25 cent per copy printing."
It's not a matter of bookshops doing PoD, it's PoD displacing bookshops.
There are also cash flow and technical/editorial issues involved in volume printing.
My local history group produces books every year or two. Forecasting print runs is a nightmare. A large print run is cheaper per copy but requires a larger upfront cost which we have to try to extract from our parent society and the consequences of getting it wrong linger with us. We have one book which has quite a substantial stock left years after it was printed but others have sold out within weeks. When we do local history fairs we'd be able to sell quite a few copies of the latter if we still had them but what we actually have are all too often the slow sellers.
I've been trying to persuade them to take the PDFs of the sold out books and make them available for PoD. We could get a few books run off to keep a stock for fairs and also sell online*. We could still do this at a price within shouting distance of the unit costs of our normal print run without having the society's funds tied up in stock.
If we did the entire operation PoD we'd be free of page restrictions - the way that current production works constrains the page numbers to multiples of how many A5 pages fit onto what ever the the size of the stock the printers use which may mean omitting material to meet the constraints.
However this is automation and vastly different to AI.
*Yes, we could sell online now and "all" that would involve would be setting up a website. Unfortunately that's another long running discussion with the parent society. Handing over to a PoD firm would take that off our hands along with all the other aspects of order fulfilment and also provide the cost advantage of local printing vs postage for overseas sales.