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It's kind of a miracle that no one at ASML made "the hard but necessary decision" to give up on EUV.

The research wasn't done by them — it was paid for by the US gov't and developed at US labs. ASML were given the research knowing that it could work.

That is a bit of an oversimplification of what happened. A lot of basic research was done by US labs. But it took ASML almost 20 years to convert this research into a production ready system and nobody else succeeded. And they also got some big research grants from the EU[1]

[1]https://cordis.europa.eu/project/id/28160

IIRC there is also some IMEC research in those ASML machines (which might also have been partially EU funded)?

The US had an EUV project that ran like 2-3 years and cost a few millions. ASML spent two decades and billions on it. That's like saying that the Manhattan project was given to the US by Lise Meitner and Otto Hahn.

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