I don’t have that much of a problem with current LED offerings. I know the spec differences but my 8’s LED screen is lovely. Are people really interested in off-axis viewing in an iPhone? (Cue the flames.) What really has me interested is microLED. Hopefully that will be coming, and Apple is stopgapping with OLED until microLED is ready for prime time.
Think OLED makes the iPhone too expensive.
Microled excites me but we are probably 3-5 years off, first Apple will test the water on the AppleWatch.