This isn’t about 3×1 red/green/blue subpixels, though it could be applied to it; the article only mentions that once. Rather, it’s about calculations at fidelit

This isn’t about 3×1 red/green/blue subpixels, though it could be applied to it; the article only mentions that once. Rather, it’s about calculations at fidelity below one pixel, which turn out to be important for accurate and pleasant results even without ClearType-style rendering, especially if you’re animating size or position changes. I kinda wish variants of the last half-dozen paragraphs had been at the start also, to give context.