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This would permanently increase DRAM prices. Memory fabricators either earn billions of dollars in income each year or they can't keep going. There are no little Mom and Pop businesses that can do photolithography on leading process nodes.
Nonsense, it would force vertical de- integration. Chip fabs used to be like book publishers; you don't have to own a printing press to be an author. Carver Mead even described his vision of the industry that way. Nowadays you have to get your cell libraries and a large chunk of your toolchain from the fab. Of course it's laundered through cadence+synopsys, but it's still coming from the fab. You have to buy your mas…
I can still make a book like that in my basement. People do this as a hobby now. You can still build chips like that in your garage. People do this as a hobby now.
These things DO NOT SCALE... you cant have 10,000 people running printing presses in their basement to crank out the NYT every day. A modern chip fab has more in common with the printer for the NYT than it does with what you can crank out in your garage.
Let's look at TSMC's plant in AZ. They went and asked intel "hey where are you sourcing your sulfuric acid from. When they looked at the American vendors TSMC asked intel "how are you working with this". Intels response was that it was the best they could get.
It was not.
TSMC now imports sulfuric acid from Taiwan, because it needs to be outrageously pure. Intel is doing the same.
Every single part, component, step and setup in the chain is like that. There is so much arcane knowledge that loss of workers represents a serious set back. There are people in the production chain, with PHD's, who are literally training their successors because thats sort of the only option.
Do you know who has been trying the approach you are proposing? China. It has not worked.
https://www.youtube.com/asianometry probably the best rough and ready education you can get on the industry.