The dashed line is distracting and confuses when you are using dashed lines deliberately elsewhere. Why can't we just have an infinitely long canvas of a specific width? That's what I was expecting when I heard of pageless. Was disappointed. I'm not sure why I'd want to be able to set a minimal text width and then be left with infinite margin.
yeah I use it and it works quite well but then people use footnotes and they look weird there; disallow footnotes and make that dotted grey line go away and I'm sold
also: the view is a user-setting. When I author some text I still need to think about how does it look when there is a page split (e.g. tables, figures etc) in case some of my colleagues may end up reading it in the "print layout mode.