I'm starting to think that Microsoft not only designed the Series S for those that are just interested in GP or those looking for an affordable gaming option, but also to cater to the Japanese market. The thing can fit on your hand if you've got a big enough hand. It's absolutely insane how small the console is and I wouldn't be surprised if that form factor was designed with Japan in mind. Even if it wasn't the case, the Series S continues to look more and more genius on Microsoft's part.
It won't continue throughout the generation if Microsoft doesn't invest into getting more games or exclusive games that cater to the Japanese market on Xbox, though.