I'm honestly thinking that PS5 costs more to build than XSX at this point. We have an expensive custom SSD, a pretty high tech controller, a case that doesn't look cheap to produce and will likely require a pretty expensive cooling system. XSX by comparison has a more expensive AMD APU, but a cheaper controller that doesn't even have an internal battery, let alone haptics, trigger motors, a touchpad, a microphone, and a speaker. XSX case design seems much cheaper to build, and it can be cooled by a single fan, I suspect Sony will need multiple fans to cool PS5 unless they want it to be loud and hot again like PS4 Pro. I'm not sure about $600, but I wouldn't be surprised if disc drive PS4 is $550, discless at $500.
Series X comes with a controller that doesn't have an internal battery? Can you explain this further? Does it have a rechargable external battery or something?
Much like Xbox One's controller, it is designed to accept AA's, because MS found that when surveying their fanbase, about half still like to use AA's. You can purchase a rechargeable battery pack for it, by buying the Xbox play and charge kit, but afaik it doesn't come bundled with one of those rechargeable batteries, just 2 non-rechargeable AA's.