AMOLED is build by alot of LED into the screen , hence it's more contrast and look great on the phone , but when come to endurance , AMOLED is more easy to get burn in if open brightness at max level
For example , when u driving at highway or pass from some under bridge , u will see those Advertisement with LED right? For few month u will see it's great , but after this u will start notice some of the LED panel isn't complete , sini no light situ no light , it's because the LED actually burn off , that why u will see the LED panel will have some place didn't light up
For the phone nowaday Samsung E4 Amoled , they make the pixel very big which mean A Square inside have another 4 Square with full of LED , that the reason why LED will look great , very contrast because it will display more pixel detail than IPS panel , actually Amoled display will get Burn IN time to time , just we sometime can't detect with our Own Eyes even your phone having 10-20 tiny LED burning off
on the other hand IPS is like backlight projector , i won't cause burn IN , if IPS rosak then it direct rosak , habis cerita , that the reason why Projector , IPS panel tend to more BIG and Eat space when it come to Mobile , most of the IPS panel phone will more thick and big size while Amoled is just like a piece of paper with full of LED
So from alot of youtuber video , they tend to open MAX brightness to play those high end games , end up the screen of LED heat up + processor heat up at the same time and causes the phone given u the warning , who on earth will open max brightness for A E4 Samsung Amoled that have 1300 NIT ?? seriously , 30-50% is more more more than enough
So it actually not a problem , it's just like ur home FUSE that when kena lightniing and ur electric box will JUMP , if no jump then ur house bye bye

This max brightness explanation helps to me order this phone as I thought this will be a very annoying problem if the screen keeps on dimming