[Tade0]

There exists domestic supply, it's just not scaled up:

https://www.goodram.com/en/

You don't see their products in stores too often as they're focused on B2B - particularly the automotive sector.

That being said I have a 128GB memory stick from this manufacturer and I hope they make the most out of this windfall.

[duskwuff]

I'm pretty sure they're just assembling DIMMs (and SSDs), not fabricating the memory ICs on it. The latter are what are in short supply.

[rasz]

Thats assembly, couple lanes of PCB Reflow ovens. They have been at this since mid nineties, always offering lifetime ram warranty too. Ram and SSD pretty commonly seen in retail.