One thing I'm surprised that nobody has mentioned but is a MAJOR reason I don't want modern view: I run with a slightly larger screen due to minor vision issues, but with modern view at my default screen size I don't get ANY lines of data displayed on my screen because all the report heading stuff is fixed on the page and only the detail lines are scrollable. If I reduce my font, I can get a couple of scrollable lines of data on the screen. In classic view, the entire page scrolled and I can large sections of the report on screen.