One of the issues I’ve had with iPhones to date is with readability/usability in intense outdoor settings. I’m talking 100% or close to 100% sunlight and 85+ degrees Fahrenheit. Phones will generally work well for 5-10 minutes but quickly dim to the point where it’s difficult to read.
I’ve been pleasantly surprised with my iPhone 14 pro max. Been outside in a bright hot and slightly humid setting, and haven’t noticed any screen dimming (if it’s dimmed at all, it hasn’t affected readability)
No phone will be perfect in direct sunlight and high heat but this feels like a major step up.