There’s a minimum recommended VRAM of 8GB, anything more doesnt make it faster. 6 GB works too, a bit slower, not sure about 4 GB right now.
3060 is more power efficient, 6 GB VRAM is enough for farming too.
Will make it harder, which means only whales will be able to take advantage of GPU farming and plotting.
Chia doesn’t even have a k33+ plotter yet (one that makes sense to run, and does compression, C1 is basically free), so this would be quite insane.