Usually higher efficiency or greater comfort, or in really egregious cases the perfect combination of both. You'd need to ask Yamaguchi exactly what they thought they were achieving here.
It turns out that it's surprisingly difficult to design a space frame which outperforms eleven straight tubes. You're nearly always much better off using the same amount of metal to make one big tube rather than a multiplicity of small ones.
Usually higher efficiency or greater comfort, or in really egregious cases the perfect combination of both. You'd need to ask Yamaguchi exactly what they thought they were achieving here.
It turns out that it's surprisingly difficult to design a space frame which outperforms eleven straight tubes. You're nearly always much better off using the same amount of metal to make one big tube rather than a multiplicity of small ones.