I merely comment on the concentration of customers and how it has not at all hurt Nvidia's margins. In fact, they have expanded quite dramatically. All of your other points are moot.

> "rising costs"

Nvidia's margin expansion would suggest otherwise. Or at least, the costs are not scaling with volume/pricing. Again, all we need to do is look at the margins.

> "their position quite untenable ... But until ROCm is at least _easy_ nothing will happen there"

Seems like you're contradicting yourself. Not sure what point you're trying to make. Bottom line is, there is absolutely no concern about monopsony as suggested by the GP. Revenue is booming and margins are expanding. Will it last? Who knows. Fat margins tend to invite competition.