Scaling up only works to a certain point. Not every screen is a phone screen and should suffer from the same amount of visible text. If I scale a page to a good line length I end up with text so comically large that only a single paragraph fits on the screen, if at all.
When lines get longer you either have to increase the leading, or font size, or shorten the lines to retain readability. Personally I hate having to detach every other tab from the browser just to change to width to something that's readable. In that sense I much prefer the content to have a maximum width beyond a certain viewport width because it's the only viable option to still have text that is readable.
When lines get longer you either have to increase the leading, or font size, or shorten the lines to retain readability. Personally I hate having to detach every other tab from the browser just to change to width to something that's readable. In that sense I much prefer the content to have a maximum width beyond a certain viewport width because it's the only viable option to still have text that is readable.