Laptops have real physical limitations involved, similar to smartphones don't have RAM slots, so I don't buy the video. But silly as it is, at least you can "download" heated seats later if you change your mind.
Perhaps it is reasonable to solder parts to the motherboard. It's less reasonable to charge a massive markup on storage and memory. The margins on those upgrades are well over 100%.
Yeah, even if the soldering isn't intentional for non-upgreadability, they certainly took advantage of it in the pricing. And with the heated seats, the margin is infinite.