My impression of Arm-world SMT is that it was added in duress because people kept asking for it despite the word-of-God being that it was better just to add add

My impression of Arm-world SMT is that it was added in duress because people kept asking for it despite the word-of-God being that it was better just to add additional cores (I wonder if their license structure influences that claim?). Today SMT Arm cores are still very much the minority, so either the fashion sustained or their customers/implementors agree that more cores are better than fewer cores with SMT. There are no AVX-512 instructions. But that's the x86 branding of the vector instructions that you can only implement with the right x86 licence. So it's tautological. Arm can have vector instructions and languages are even beginning to make portable interfaces for vectors on multiple architectures.