meaning that miners most likely will not look at these as viable options for mining
That's what everyone said in the past year or so every time a new card was released and without fault they've been wrong every single time.
I mean, if there wasn't a GDDR shortage up until now, this kind of guarantees there will be one. Wth does this GPU need 12GB for?
I just fired up nicehash and after a while the memory usage goes past 6GB easily, so for mining a regular 2060 might not cut it in the future.
People have to come to terms with the fact that from now on Nvidia and AMD will mostly be concerned about how well suited their products are for mining, that's why all of these choices seem really strange. It's because their not meant to appease to regular consumers.