According to my doctor and my eyes state since I've started using M1 air it doesn't matter which frequency was used by the idiot who decided that PWM is a good idea to regulate brightness of the monitor.

Also there is 60Hz flickering that doesn't go away with any brightness level.

I think it is especially bright idea to design a working monitor and then spoil it with PWM rendering it unusable. I personally consider it as a fraud and the essence of disrespecting people.