Nothing has changed as far as I can tell. I have tried all the new machines in store and they all still very much cause eyestrain, dryness, and headaches. I have since switched to Windows (
a Dynabook with an EyeSafe display, I have a previous version of this which I bought about a year ago) and have zero issues now with eyestrain and headaches even after hours of continuous use. It is a 14" display and the laptop weighs 2.3 lb. Unlike Apple laptops, it doesn't feel cold and the edges are not sharp.
I still get eyestrain and headaches if I use my iPhone SE 2022 for very long. Something is very messed up with Apple's display tech. And despite complaints from many, Apple makes no effort to address the issue. This is hubris on their part and they will pay for it at some point.