In reply to Milen Petrinski.

@milen I'm a bit torn on this. I love the concept of CSS columns. The idea of just writing your text freely without worrying about how it will be displayed is attractive. But a developer I've rarely found CSS columns to be practical. It never seems to break your content up quite the way you expect it to.

Lists broken in the middle of an item. Images moved to the next column at certain breakpoints despite being associated with the text in the first column. There are are many more cases. I have almost always found my clients prefer the increased control that discrete containers offer.

I would agree that the editor should make the columns responsive by default. But as a developer I'd prefer they leave making them responsive on the frontend up to me in the theme.