Ok, but does anyone really want to read at hundreds of chars per line? Just look at the comments here. It's pretty clear that there is a widespread preference for fewer. This makes sense, since typesetters figured all of this out long before CSS existed.
You cited research, then when pressed on it, gave up on actually citing any, and just appealed to people's preferences. If this is really about preferences, that's what you should've said, rather than making a fake claim to have scientific backing.
