I believe what he is referring to is this going away after you create a primitive:
Maya can keep this data after the fact with History on. And a few other apps offer this as well. I don’t mean Houdini, like that. I just mean basic parametric modeling of primitives with history. Blender could improve on this by offering to allow parametric modeling to be non-destructive.
This is something else entirely:
Having parametric history is of course limited. But many people coming to Blender would expect it.