User blog comment:Rupert Giles/Layout Changes: Breakpoints and Typography/@comment-3544775-20150519140420/@comment-126761-20150519144306

We certainly do still want to give users on big devices a good experience, but consider this situation: an editor creates a table that looks great on a big device. However, it looks awful on a smaller device - but they have no idea.

It's a situation we see time and time again on Wikia as we've been working on better support for tablet and mobile devices.

It's not the editor's fault - they simply didn't know this was going to be a problem. Having a more consistent layout acrosss devices avoid this issue.

There are other benefits as well - another major one being that very long lines of text are hard to read. While you might see more text at once, that doesn't mean it's actually more usable.