I was thinking this, but I doubt that the HBM is so easy to repurpose.
I’m assuming that it’s mounted in the same unit as the GPU, not in a handy-dandy socket.
It could be cracked open and extracted no doubt but if it’s glued in that’s going to be nigh on impossible to extract.
I had been pinning my hopes on HBM coming onto the second hand markets after there three years or so of use, perhaps I’m wrong.