It might, but most likely it won't: splitting position data from the rest of vertex had been around since, at least, PS3 (for the similar reasons of culling pri

It might, but most likely it won't: splitting position data from the rest of vertex had been around since, at least, PS3 (for the similar reasons of culling prims) and yet how many games have done the Edge's tri-culling in that generation? And even if you go ahead and split off position the rest of the vertex is still better be interleaved.