> Vectorization doesn't imply SIMD, of course. The first vectorizing compilers were for CDC(?) systems long before SIMD. Today you have SVE in Arm, for instance, distinct from SIMD Neon.

I wouldn't say "long before" since SIMD machines like ILLIAC IV came out with the IVTRAN compiler at the same time as the ASC/CDC. SVE is also considered SIMD https://support.arm.com/documentation/102340/0100/Introducin...