Why would anyone carry 3-4 phones daily? I have 3 lines in my Note, 2 sims, 1 e-sim.
As for your answer. It's the camera, the video, ability to have global use, durability due to the really heavy use. The iPhone is far from satisfactory, but lost connection or ability to simply get a phone out that has the 1TB capacity I currently have with the Note 20 Ultra matters to me.
The camera in the Z & fold are too poor, it's a shame, the camera in the Note 20 is brilliant. Each phone in our inventory is on its last let's, simply the hard life they get in 12 months. A Z or Fold would last 2 months.
If and it is a big if, the S22 Ultra is as good as some claim, we will have to wait until halfway through our year and replace those phones in the worse condition.
Owned everything from the original Note to S22 Ultra. Disappointing that Samsung does innovate as they used to.