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And it's important to point out how long these fabs have been under construction.

Micron started building it's new fab in 2022. They are expecting their first chips to be out by 2027 (maybe). The projected cost, $50B.

This is a fundamental problem which the free market cannot handle. It takes multiple years and billions for competitors to spin up. No sane bank or business person would try and get into cutting edge memory fabrication. That means the players we have are the players we'll likely always have (With MAYBE china entering the arena).

The free market only works when the required upfront capital for a new player to enter a business is relatively low. In industries where the players are static or shrinking, you have a free market failure.

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correct, which is why industrial policy is important.
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> 2 years is not remotely enough time to spin up a competitor. It's not even enough time for a current leading competitor to spin up another fab.

But it is enough time for customers to consider competitors they may have avoided before.

So maybe their priced-out customers give Chinese DRAM a serious look, make some compromises, and never go back to Micron.

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Then there is risk; who is to say that the current demand will be around in five to ten years by the time you ramp up.
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Imagine being the sucker to go and do a big capex build out for a hypothetical demand in two years. Have fun explaining that to the investors who supported you. Also you probably need 5 years to cover your expenses at whatever the current costs are. If the volatile prices collapse you are in a world of hurt.

Someone will certainly take this bet - but it is a high risk one.

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