curved or not curved, all OLED flicker. you just cant see it with just your eyes unless you're a geeky nerdy one. if you dont want flickering screen, u can opt for IPS LCD display screens.
IPS and TFT panels are used in cheaper and affordable devices, OLEDs are usually for more expensive ones, or some time midrangers. If you say that we don't have choice to use inferior displays in more expensive devices, you might as well purchase cheap devices in which you can put your trust for long period of use instead of fearing for burn-in or flicker. After all, all display will fail after some time, usually not shortly. Again, I don't understand what's your point. If you don't know what you're talking about, pls don't project misinformation.
There are two types of OLED displays: hard (unbendable) and soft (bendable). The hard display connects using a ribbon cable that can be bent into a U-shape to connect to the board. The soft display doesn't require this ribbon cable; it combines all connections into a single connection. This is why some model have problem and others without. This is why some models often have problems, while others do not.
