Hopper is ~4 years old at this point though, compared to Blackwell which is ~2 years old, the difference isn't nil.

Depending on your use case, you might prefer native FP4 and FP6 low-precision support and 5th-generation Tensor Cores rather than what Hopper offers.

I think for training Hopper makes sense as it's generally a bit cheaper and the difference isn't that big, but for inference the difference widens a bunch makes a lot more sense to go with Blackwell.