These seem really useful for a huge range of use cases. But they also sound expensive or hard to build to the point of being bespoke: “Koenigsegg uses all sort

These seem really useful for a huge range of use cases. But they also sound expensive or hard to build to the point of being bespoke: “Koenigsegg uses all sorts of interesting materials for the construction of the Quark, including aerospace/motorsport-grade steel, and hollow carbon fiber”