You'd have to have specific requirements to upgrade. The biggest is the front screen for me. But it's more of an incremental upgrade as essentially they are very similar. For me personally, I couldn't get on with the Fold 3. Chiefly because of the narrow front screen. So for me it was a worthwhile upgrade to the Z Fold 4. They are expensive devices, and upgrading from the Z Fold 3, you'd have to think very hard about whether you'd get the benefit from it over the cost
Yes very true, will try a hands on as keep thinking the S22 camera was the way to go, but the foldable screen has been a game changer, especially for work, even when working if not at my desk I can easily do nearly all tasks and run meetings.
Oh plus funny unfolding the screen in front of iPhone users 😜
DAILY DEVICES ZFold4 [Mobile], Pro5 [Watch], S8 Ultra [Tablet], Book2 Pro i5 5G [Laptop], Buds Pro2 [Buds] M70A 32/43" [Monitor], Smart Tags+, iPad Mini 5 and iPad Pro 12.9 GEN2 [Tablets], Dell Inspiron G5 Laptop
HOUSEHOLD DEVICES ZFlip3 and ZFlip4 [Mobile], Watch5 40mm and 46mm [Watch], S7+ and S6 Lite [Tablet], QN95A [TV], Q900A [Soundbar], MC28M6075 and MC32K7055 [Microwave], Jet 75 Complete (Vaccum), Samsung Level [Speaker], Buds Pro [Buds], iPhone 12, iPad Air 2, Air tags