We don't need to differentiate magical knowledge and scientific knowledge. The sundering also wiped out all their pre-existing knowledge of magic. And that had to be relearned right along with how to make the wheel.

But it seems the sundering people started at rank 0 in knowledge of magic and science. And probably a whole bunch of other things. Now THAT would be a heck of a time travel expansion. Caveman elezen. Pygmy/cannibal tribe lalafel.

Google tells me that cavemen existed in our world 2 million years ago roughly. So there HAD to be some intervention from Hydaelyn to teach them enough to advance to where we are now in only 12k years.