Delta Airlines has designed smaller bathrooms which enable them to cram four more seats onto their 737-900 planes. Always in search of ways to make their customers happy. I’m sure they also increased the amount of overhead carry-on storage.
Eventually, I predict, airlines will entirely eliminate restrooms. You’ll use an app and wifi to remotely eliminate waste, sending it directly from your body to a waste bin in the bowels of the plane. No more of this hardwired nonsense.