That's been my experience, too. I prefer high-DPI monitors, but back when I was going into the office (remember going into the office?) and connecting my MacBook to a 1920x1200 monitor, text was perfectly readable. I suppose if I had two low-DPI Macs, one running Catalina and one running, I don't know, High Sierra, I might be able to tell the difference at smaller font sizes,
As an aside, I wonder whether the article's explanation of how font hinting works -- I confess for all these years I didn't know the point of "hinting" was to make sure that fonts lined up with a rasterized grid! -- explains why I always found fonts to look a little worse on Windows than MacOS. Not less legible -- arguably hinted fonts are less "fuzzy" than non-hinted fonts on lower-resolution screens, which (I presume) is what people who prefer hinted fonts prefer about them -- but just a little off at smaller sizes. The answer is because they literally are off at smaller sizes.
As an aside, I wonder whether the article's explanation of how font hinting works -- I confess for all these years I didn't know the point of "hinting" was to make sure that fonts lined up with a rasterized grid! -- explains why I always found fonts to look a little worse on Windows than MacOS. Not less legible -- arguably hinted fonts are less "fuzzy" than non-hinted fonts on lower-resolution screens, which (I presume) is what people who prefer hinted fonts prefer about them -- but just a little off at smaller sizes. The answer is because they literally are off at smaller sizes.