I am not sure where I land on this issue, I am not entirely sold that it should have been filled to the brim and packed tightly but it does seem like they could have done better either for repairability or at least having things like a headphone jack and maybe better speakers (I have read that speakers can do better with more hollow space without adding much weight but I’m not knowledgeable enough)
The comments have a lot of good viewpoints
Have you seen the surface book? It could have twice the battery capacity if they just put more batteries into all the empty space.