Had a Z Fold 3 until only recently.........while I was glad to try out the form factor after moving from a Note 20 Ultra, and don't regret buying one, I recently decided to move back to a "normal" S22 Ultra.
Doesn't take too long for the WOW factor to dissappear with the Fold when your day to day use starts running into issues. Firstly, the single screen of the Fold is really next to useless IMO. Far too narrow, far too bulky when in use. Fine with calls etc, but for anything else, you're soon opening it up.......so its a two-handed phone at almost all times IMO. Crease only becomes more noticeable IMO, and the interaction with the softer screen only really wishes you to go back to a normal form factor.
That said, the big real estate is nice, and it takes some adjustment to go back to the smaller S22 especially when using the SPen, but then again, I was always less inclined to use the pen with the Fold, as there was nowhere to store it other than the terrible case supplied as a preorder bonus.
The Fold 4 needs internal stylus storage at a very bare minimum.
The S22 Ultra doesn't give a meaningful performance jump over the Fold 3 all the same, so it's a little on the bland side for me, but it's an extremely solid unit and if forced to use only one, I'd definitely go for the S22 9 times out of 10.