[antonvs]

In economics, scarcity applies to almost all goods and services, because they’re not infinitely available - see https://en.wikipedia.org/wiki/Scarcity

As such, saying “GPUs are scarce” is an empty statement from a strictly economic perspective - so are all other physical goods. The correct economic phrasing would be “there is a shortage of GPUs” or “GPUs are in high demand”.

Of course, in colloquial English we interpret “GPUs are scarce” as meaning the same thing.