Earlier quoted context omitted.
> Run a study and then talk. It has been running for centuries. It’s called typography. Its rules are not arbitrary and legibility is the most important one. No need for scare quotes around readability. It’s a science. There’s a latitude of contrast ratio between which human eyes can comfortably withstand and discern tones. It varies across individuals, of course, but not as much as you might think. No human sees ult…
That is indeed fascinating, but has positively no bearing on someone's off the cuff perceived opinion about readability.
Compare the job of this algorithm, having to deal with a crazy amount of possible color combo, to that of an experienced UX designer making just a dark and light theme, both thoroughly tested, and you can begin to grasp the trouble they’ve put themselves into.