Oled screens are remembered with their screen burn ins and therefore people bare afraid to buy smartphones with oled screens but I think it depends on the regular use and quality of the screen.
Usually somewhat decent samsung ones last for about 3 to 5 years until some very small burns or green tint starts to appear.
IPS is still a good and cheap option of course, you almost never see burns on most displays, though ghosting is a slightly more common issue; not to mention the worse contrast and black point.
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From @imapirate