I have both 2 and 3 folds.  I really like the 3 because I write alot.  I would of wish for better way of storing ot but I have my own unique solution that works.

for fold 4, I think if they make a main screen more like a real phone.  it would make using the main better but increase the big to screen.

that would cool  buy will ask will be too big then don't buy it.  this device is for people who need it not you.