I'm loving my 9 Pro Fold with GOS. I'm using my phone more, unfortunately. If you're trying to lessen your dependency on a device, skip the Fold, lol. I find myself primarily using the inner screen because it's such a better experience than using my old Pixel 7. Unfortunately, lots of apps aren't designed to take full advantage of the screen real estate. And if you're an old fart like me, you'll be battling (and losing) display scaling and font size on the dueling screens.
I really wish I could set these preferences on a per screen basis.