Comment by montroser
Yes, functionality trumps design if something has to give -- but what is the text overflowing into? Often it is overflowing into other text, and so now neither is readable. Or it is pushing other content unreachably outside the viewport. In this case, it's a lose-lose situation, in that both functionality and design have suffered.
For example, NYT with 200% text-only scaling: https://i.imgur.com/zp7pDW3.png
The problem there is trying to fit all the content on a single line. Obviously that's an immovable-object-vs-unstoppable-force scenario. Instead, let the layout elements flow downward.