In that particular sentence, I am making a distinction against static size packed SIMD, so SVE/SME would not have been a good example to compare against. But you are right, RVV is closer to ARM's SVE or vector ISA that the constant size SIMD extensions. And the on-going matrix extension evolutions of the RVV ISA (VME, AME) could certainly be compared to Arm's SME.
Strange that you mention NEON, but not Arm's Scalable Vector Extension (SVE), which is much more similar and probably was the inspiration for RVV.
In that particular sentence, I am making a distinction against static size packed SIMD, so SVE/SME would not have been a good example to compare against. But you are right, RVV is closer to ARM's SVE or vector ISA that the constant size SIMD extensions. And the on-going matrix extension evolutions of the RVV ISA (VME, AME) could certainly be compared to Arm's SME.