“[Citation needed]”. Justified text (more often than not) looks awful[1] and breaks reading rhythm (even if not consciously perceived). That doesn’t prove your claim is incorrect; I’m pointing it out to explain why I find it dubious. What’s your source to say that most people prefer it?
Most people don't really know what's good for them...
Justification falls apart on mobile web where too few words can fit on a line and then you get big gaps between words.
On longer lines, a ragged right edge makes a good visual guide to keep the eye on the right line while reading a wide justified paragraph is hard to keep track of while reading.
This depends on the font size and even then I regularly read standard ebooks in elinks on my pinephone at night with a width of something like 20 chars because xterm is so zoomed.
“[Citation needed]”. Justified text (more often than not) looks awful[1] and breaks reading rhythm (even if not consciously perceived). That doesn’t prove your claim is incorrect; I’m pointing it out to explain why I find it dubious. What’s your source to say that most people prefer it?
[1]: https://news.ycombinator.com/item?id=25338737