What’s with the size?

I comfortably use pro max with one hand: phone rests on the pinky at the point where usb-c hole is.

Reachibility (gester of swiping down on home indicator) brings UI half screen down to reach upper regions.

Some use pop sockets.

Hey! That’s how I use my iPhone 15 Pro!

Mainly for reading web sites and my calendar, but it works one handed for that just fine.