In my opinion, content boxes, in the basic setup, have outlived their usefulness with the advent of flexbox. The timeline feature is the only reason I would use this element.

Content boxes (1 per column, no column spacing)

Content boxes (default single instance, 3 columns)

No content boxes, 3 columns, no  column spacing

I prefer this style because you can have different length text and keep the buttons aligned.

Test

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Test

Maecenas posuere nec nulla vel fermentum. Pellentesque semper gravida ultrices. Nullam.

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Test

Etiam at feugiat nisi. Sed lectus nulla, blandit a auctor a, luctus ac sapien. Maecenas posuere nec nulla vel fermentum. Pellentesque semper gravida ultrices. Nullam.

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