Great article, thank you. In case you do the test you described in your article, consider including the non-OLED displays too. My issue started when pixel density and smoothness got upgrades around 2014. (The 12 is bad for me but so is the 11. I'll paste my comment from above here as well for context.) I've worked with both Apple's tech team and a few neurologists to see what it might be -- the neurologists think it is migraines in my ears and sinuses but we aren't clear on what component is triggering them. I'd love to know what you find as you keep working on this.
"Hi [OP], I've been having this same issue since about 2014 so not only tied to OLED. I noticed it first when Macbook got retina screens. I spent time with developers and the tech support team at Apple as I returned some very expensive machines and they were curious why. They put a few on the call because they were excited that I was 'one of those users'. I'm one of the users that can't watch first person video games or AR tools or watch real estate 3D home tours too fast without getting sick. I'm using the last of the non-Retina Macairs from 2015 while keeping a 2011 and 2012 Macbook alive!
The phone issue is getting more urgent for me though. I've been keeping a 5S alive but it will soon not work on the network anymore. I did a lot of research and thought the iPhone 11 might work for me -- I tried today and no luck. I was quite sick with in 5 minutes of using it. It is the carsickness others describe but it might also be a sinus/ear migraine.
Anyway, I just wanted to reassure that it isn't just you, it isn't in your head, and it isn't just Apple's products. I'll keep hunting for the answer for me!"