Wider adoption of hydrofoils is prevented by the increased complexity of building and maintaining them. Hydrofoils are generally prohibitively more expensive than conventional watercraft above a certain displacement, so most hydrofoil craft are relatively small, and are mainly used as high-speed passenger ferries, where the relatively high passenger fees can offset the high cost of the craft itself. However, the design is simple enough that there are many human-powered hydrofoil designs. Amateur experimentation and development of the concept is popular.
wider adoption of hydrofoils is prevented by the increased complexity of building and maintaining them hydrofoils are generally prohibitively more expensive than conventional watercraft above a certain displacement so most hydrofoil craft are relatively small and are mainly used as high-speed passenger ferries where the relatively high passenger fees can offset the high cost of the craft itself however the design is simple enough that there are many human-powered hydrofoil designs amateur experimentation and development of the concept is popular