Ask HN: Why does Wikipedia still render equations poorly on retina displays?

A question that the HN crowd may know the answer to. Every time I visit Wikipedia to read a technical article, the LaTeX markup annoys me immensely as it doesn't display correctly for retina (or HiDPI) displays. The font is pixelated and is rendered for low-res screens.

High resolution displays have been around for quite a while now; is there some reason that Wikipedia persists in using low quality graphics?