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If you follow the link in the post explaining the math behind everything, it says: "They use more bricks than a straight wall of the same thickness but they don’t have to be as thick."
A better description is "uses less bricks than a straight wall of equivalent resistance to horizontal forces"
Yeah but more space, and are therefore the wrong choice a lot of the time.
Following the link which is supposed to explain another thing, why it is more resistant to lateral forces, it contains an explanation:
> The parameter a is the amplitude of the sine wave. If a = 0, we have a flat wave, i.e. a straight wall, as so the length of this segment is 2π = 6.2832. If a = 1, the integral is 7.6404. So a section of wall is 22% longer, but uses 50% less material per unit length as a wall two bricks thick.
"as a wall two bricks thick". Hmmm. Even bigger savings as a wall three bricks thick.
I believe I've read that some plants do better when planted in the concave portion of a wavy wall, because the bricks absorb warmth during the day and release it at night.