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A 7nm design uses less area, and is probably just going to get cheaper over time. A smaller, 7nm RDNA2 design might be easier to make than backporting RDNA2 to 14nm.

I think an older GPU might still be useful, but from a cost/benefit perspective, it seems to make more sense to just make a smaller chip on the latest process (especially if your latest technology, like RDNA2, already has lots of data on the 7nm node).

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7nm capacity is likely to be tapped out for the new couple years. The OP's suggestion (I believe) was literally just to keep making older 12nm cards (no backporting) to supplement current supply.

Normally this would... not really work well. But in the current environment, it'd probably work just fine (just look at how much GT 1030s go on sale for...)

I think an older GPU would definitely be useful. Used GTX 1080 cards (I picked one up used for C$375 back in September) are listed for C$750-850 where I live. I'm not as familiar with AMD's products but I think 1-2 generation old GPUs would definitely have high demand until current gen ones are more available.

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