Yes, AVX-512 IIRC adds scatter/gather, and masking/predication, bringing it substantially closer to classical supercomputer long vector ISA's compared to the sh

Yes, AVX-512 IIRC adds scatter/gather, and masking/predication, bringing it substantially closer to classical supercomputer long vector ISA's compared to the short vector ISA's mainstream CPU's have been equipped with for the past decade or so. Still, even with these improvements, as explained in Andy Glew's slide deck I linked to, it's less flexible than a SIMT style approach.