The thing I found interesting in the AVX512 gains over AVX2. That's a pretty nice gain from the wider instruction set which has often been ignored in the video community.
The part Intel struggles with is that in many places if they had the 256-bit max width but all the new operations then they could build a machine that is faster than the 512-bit version. (assuming the same code was written for both vector widths) The reason is the ALUs could be faster and you could have more of them.
But the number of situations where AVX512 has a significant advantage is growing, so interest will grow alongside it.
Ironically AMD has stronger AVX512 support at this point despite the spec originating at Intel.