User blog comment:Rupert Giles/Layout Changes: Breakpoints and Typography/@comment-89.241.67.210-20150519184824/@comment-5108618-20150519185106

Unfortunately, fluid layout did not allow for predictable behavior across multiple devices, which we are trying to adjust for now. With breakpoints, there will be more predictable behavior, which makes it less likely for certain templates on a page to break or look "off" depending on what device someone is viewing it on.