I bought one about a year ago expecting the gimmick to get tiresome but honestly I love it. I bought one a couple models old so it didn't even cost me that much, I picked up a Z Fold 2 around when they were releasing the Z Fold 4, I think. So far it's been great and I absolutely love being able to fold the screen open for gaming or for reading. The single front screen is a bit skinny but you get used to it.
I've read about 3x more books since I got it than I used to, and emulator gaming is getting new life (as well as native games like Polytopia or Slay The Spire). I honestly recommend them, which I didn't think I'd find myself doing.
To me the folding thing is nothing more than a gimmick to try to get people to shell out even more money for a phone. I would much rather go with something on the higher end of the low-end, think around 400.00 or less and have money for a laptop. I don't see the point of spending as much money on a fucking phone as you would a decent laptop. Makes no sense.
Flip phone is stupid, but a folding phone like the Galaxy Fold actually makes total sense. Bigger screen like a small tablet, while still able to easily fit in your pocket.
I love mine, mainly because it's so small when folded; it's like in the œlden days, when small was cool and you could actually fit your phone in your pocket without cargo pants. Folded, it's more robust than a candybar phone, and I don't worry at all about sitting on it.
I look forward to better use of the 45° format, and standardization of the API for the cover screen (for more apps).