No experience with it, but I also fail to see why they need what looks like 750g of dead weight plastic just to hold the two sides rigidly parallel to each othe

No experience with it, but I also fail to see why they need what looks like 750g of dead weight plastic just to hold the two sides rigidly parallel to each other. I thought their whole point was to have the keyboard conform to your body? I could also see wanting to put a trackpad or the like in between the halves.