Why did it take around 10 years for AMD to implement AVX-512 and will they need to wait as long for this too? Doesn't seem to be patent related (patents are 20 years and AVX-512 was introduced in 2013?).
AMD practically resurrected AVX-512 by supporting it across both desktop and server products, so it's weird to criticize them for taking a while when Intel nearly killed the thing via segmentation and poor implementation.
But who knows if AMD sees value in these new instructions/if there's market demand for them.
AVX512 vector and mask register take space on the die, which is a finite resource and could be allocated to other things.
Moreover, power consumption may have also been a challenge, as seen in the early Intel implementations of AVX512 (especially Skylake-X).
And while AVX512 can improve single-threaded performance, that's only for applications that make use of it. And up until recently, that number was extremely limited.