I'm one sixth case now, always finding one issue or another. I want a case that is as thin and light as possible too and considered a Dbrand skin but hate covering up that great beige color. I returned the S Pen but still require a kickstand and Magsafe compatibility with my car mount. I am currently using the Spigen ultra hybrid clear case because I'm not comfortable applying the magnet and ultra thin kickstand directly to the back of the phone. I wish Dbrand simply offered a clear skin.
I agree with the post above that the narrower screen is a positive. One-handed use is much easier. Typing is also fine and accurate. I find the Gboard keyboard is much better for typing on the front screen, but I also like the Samsung keyboard for it's Samsung Pass integration.
I am actually impressed by the all-day battery life. I have not needed a mid-day charge ever since getting the Z Fold 4 on 9/22. It has lasted me from 7am till 11pm with charge to spare. On a full battery it gets 7+ hours of screen-on time, equal to my previous iPhone 13 Pro. The Always On Display consumes 5% of the battery so I can probably stretch battery life further by disabling the feature, but for now it's not an issue. Ninety percent of the time I'm using just the front display. My Note 10+ lasted all day when new, under similar use, but after a year it no longer could get me through the day. I will have to see how the Z Fold 4 battery holds up after a year.
I am loving the Z Fold 4, but wish it wasn't so difficult deciding on a case.