Earlier quoted context omitted.
There are a lot of companies that have billions in cash and are also prodigious buyers of RAM. Companies like Apple, Google, Meta, Nvidia... Do they want to get into a commodity business like RAM production? Maybe not, but if prices stay high long enough that demand for their products falls off, they might think about it. I know that I personally and my employer are cutting way back on new technology purchases and sq…
And none of these companies are operating their own fabs, that's the problem. Fabs are a cutthroat business that's very hard to get into. It costs billions of continual investment to stay a float. That's why there's really only about 3 different companies with cutting edge fabs. TSMC, Micron, and Samsung. Even intel, who built a huge portion of their business on cutting edge fab tech, has struggled to keep funding it…
There are some ways to get this off the ground much quicker. One or more companies could buy an existing non-leading-edge fab like GlobalFoundaries. That buys a lot of expertise so you're not starting from zero.
DRAM also benefits from being very regular and relatively simple. It used to be what you bring up on a new process node to help prove things out.
It also isn't impossible to reduce reliance on ASML if you're willing to throw money at it. That's definitely a super-long-game move but it could be done.
I'm not going to argue that someone is going to do any of this but if demand is sustained it is possible.