At the time I originally wrote the guide, 8K was the max it could handle without crashing, I believe, but Pixel is doing so many improvements so fast, some parts of the guide may quickly become outdated.
That is a annoying for updating the manual, but a good thing in itself. But what I was referring to is that your calculation is only correct if you have 2K screen. If you have a wide screen, a 4k screen or a puny laptop screen, the picture dimensions are different
