Yeah, I'm at the point where I'm looking at manually positioning/removing one of those full-screen dimming filters so I can use my monitor past 7pm. And 90% of the time if a screen goes really dim it does so with savage PWM.
Luckily my display doesn't do that. It's also very hard to figure out through reviews so I'm glad it doesn't.
I was thinking about such a filter. But I haven't seen them for sale, I just know they exist (I was thinking about ND filters used in photography). But I wasn't sure if they exist at this size.
Yeah, I'm also PWM sensitive. You can buy devices which measure it fortunately but I've been making do with a phone camera on a high/brief shutter speed.