I have a feeling they are going to be very power efficient. Not seen a two fan cooler on a GPU that is not high end in a while tbh.
I suppose if one of my 6000 GPUs die it's going to be a way to replace one. Other than that though I have a feeling they won't be worth bothering with. That said, tbh? they aren't worth bothering with. There is nothing my cards can't run so yeah, am happy to stick. Besides, not like I have a load of games piling up I can't play properly.