CXMT has been offering DDR4 chips at about half the prevailing market rate

>> as if Samsung didn't receive government subsidies when it was developing

That's because Samsung didn't get gov't subsidies when they developed DRAM in the early 80's. Semiconductors weren't really among the targeted industries by the South Korean gov't and were largely ignored as the govt prioritized HCI (Heavy Chemical Industry), shipbuilding, steel, and automobiles. The gov't didn't understand the potential of semiconductors and viewed the growing industry as risky investment.

Unlike China or Taiwan, the South Korea's semiconductor industry was very much organic, started by a private company, Korea Semiconductor, in the mid 70's which was later acquired by Samsung and became Samsung Semiconductors Inc. And they bled millions of their own money until their own DRAM came out in the early 80's.

The gov't still believed the industry was too risky and costly even after Samsung's development of 64K and 256K DRAM in 1983 and 1984. Samsung burnt through their own cash stockpile cross-financed by other divisions, or borrowed from foreign banks and financial institutions. There was really no major support until 1986 when ETRI, a gov't sponsored research institution, stepped in to promote cooperation among domestic semiconductor players -- ie, so Samsung could teach and help bring up other chaebols LG and Hyundai up to speed.

So PLEASE no more insane whataboutism to defend China's neo-mercantile practices or illegal state subsidies.

Yes, because it can't be sourced. These are private companies. That doesn't mean that anyone's guess is as good as anyone else's.

The CEO of Anthropic, for example, has publicly stated multiple times that if their individual models were companies in and of themselves, they'd be profitable. I have no reason to think he's lying.