If you can hold off a few months the Z Fold 5 is right around the corner and might have picked up some new tricks like a seamless enclosure and integrated S-Pen.

I'm not actually sure how great a seamless enclosure will be. One reason the Fold's don't close all the way shut is so anything caught in the screens doesn't get trapped.

The S-Pen is a big deal though. With such a big inner screen the stylus is perfect for note taking, sketching ideas and just better accuracy.