On a 109ppi Apple Thunderbolt Display, the blockquote text looks like it was printed on a dot matrix printer from 1994.
Doesn’t everything look like that at 109ppi, relative to modern smartphone/tablet/imac displays?
Hmm I have no issues with it on my Pixel 5.
It's the Roboto font in 300 weight, where 400 would be a normal weight. I believe Roboto was the Android default font, so probably lots of testing/tweaks on Android make it readable there.