This is even worse than Hogwarts Legacy because the problems even exist at 1080p ultra settings.
It looks like 10GB is the minimum needed to avoid stuttering altogether so the RX 6700 should be fine as well, even though it wasn't in the list. I don't blame Steve for that, the RX 6700 is relatively rare and wasn't well-publicised by AMD (for some odd reason).
I have mixed feelings for the people who own RTX 3060 Ti, 3070 and 3070 Ti cards. I feel sorry for them that they spent so much money only to have this happen because I know that I would be livid in their shoes. I know a lot of them bought the card because at the time, it may have been all that they could get. For the ones who actually had a choice and chose to pay more because they only want nVidia, it's their own stupid fault. The Radeon cards in that market segment (RX 6700, 6700XT, 6750 XT and 6088) are all objectively better buys and have been for a long time now. I only hope that they've learnt their lesson and will look at the amount of VRAM with a much more critical eye from now on.
A card's performance and features are useless if the card can't actually employ them, regardless of the colour of the box they come in.