Of course it changes and improves usage, simply in the fact that you can carry a tablet sized screen that fits into your front pocket. The best tablet is the tablet you have, and that means either figuring out how to carry one around in a bag, cargo pants, squeezed between your back and pants, always taking up one hand, or having a foldable in a front pocket. You can say it's a small crappy tablet, but then so is the iPad mini with similar screen dimensions, which is worse in my personal use case scenario because I have nowhere to carry one and would just leave it at home. The improved portability IS the improved usage. In the same vein a laptop has improved usage over a desktop mainly because it is portable, but in essence it can be described as a "crappy" desktop because it has a smaller screen, a less usable keyboard, and less potent hardware.
I'm just stunningly baffled by the inability to grasp this functionality. I get that today's Fold phones aren't for everyone for varying reasons, whether it's usability, reliability, or whatever many continue to confound those personal use cases with a folding phone actually having a use case scenario for many of us.