The extension is agnostic with respect to the actual width of the chip's registers, and you also won't have to separately account for the "last iteration" where

The extension is agnostic with respect to the actual width of the chip's registers, and you also won't have to separately account for the "last iteration" where you have not enough elements to fill a register, or at least it will be more convenient. It also has strided load and store as well as scatter and gather. This is all I remember, there is probably more.