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Not sure why Dolosse are so special?

There's lots of different forms and shapes of wave breakers, like the Tetrapods [1] that you can find over here across pretty much every coast in Europe.

Maybe I'm just not getting it why the Dolosse shape is superior?

[1] https://en.wikipedia.org/wiki/Tetrapod_(structure)

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Apparently the Dolosse works a lot better for high energy wave environments like coastline of SA etc. They are used here, and I am sure they considered Tetrapods and there was a reason they weren't suitable.

ITT the consensus is they don't actually work better, but, were royalty free.

No idea about either, myself.

Another thing is that you need a lot fewer of them to stack to get the same effect. So cost saving.

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