If you get headaches, migraines or eye strain while using your other devices - That is a reason why you should buy the iPad Air 4 (2020) right now!
The iPad Air 4 (2020) doesn't have a OLED or mini LED display. It has a iPS display that doesn't use PWM dimming, and that means no PWM flickering. So you don't get headaches, migraines or eye strain while reading books or using it for a longer time. That's why you should buy it now, because the rumour says that the next iPad Air will have a mini LED or OLED display that uses PWM dimming. So the iPad Air 2020 is great as a ebook reader, watching YouTube videos or doing longer work on it like video editing. If you suffer from headaches, migraines, eye strain because of PWM Flickering, and still want to read books on your device, then watch the video below.