Yes because they have an autonomy incentive, but "our" (as in Western capitalism) incentives is solely on profit and profit is being done, therefore we will never solve this because in fact there's no problem. We are being mocked by all these PC parts suppliers.

Haven’t they been drooling over Taiwan’s tech and foundries for years now?

Just put them in space, that way they'll be right next to all the datacenters that Musk will be building there. It's much more convenient!

Sure. A hobbyist with the right equipment can make technically functional memory as a scientific curiosity. But making any memory module that is as powerful as anything that's come out in the last twenty years is going to require millions of dollars in investment and years of effort combining the work of thousands.

Oh nice ill take a look! We have a 10k pick and place machine over at a local makerspace and ive thought about prefab chips before. Just for fun, but its still a bit of money.