User blog comment:Rupert Giles/Layout Changes: Breakpoints and Typography/@comment-213.120.234.122-20150519144625/@comment-126761-20150519151248

The short answer to this is: users shouldn't need to fix a website themselves.

However, besides that - we believe it is best if articles have a roughly consistent look across different devices. For example, this means editors can be sure that what they write will look good for the majority of visitors, and prevents readability issues with really long lines of text.