Flying vehicles, often called 'flying cars' or 'air taxis,' are no longer just science fiction. Several companies are developing prototypes that could revolutionize urban transportation. These vehicles aim to reduce ground traffic congestion and offer faster travel times. However, challenges like air traffic control, safety regulations, and public acceptance need to be addressed before they become widespread. What is implied as a major obstacle for the widespread use of flying vehicles?
A) Lack of interest from companies.