The retail price of avgas continues to climb with fewer refineries supplying it. Aircraft parts, never cheap, increase in cost each year. Smaller airports close and larger airports raise hangar rents. Fewer private pilots are flying today than 10years ago, reducing economy of scale. Flying is getting too dang expensive.
However, flying remains an unrivaled pastime. It literally offers a third dimension over two-dimensional recreation, such as boating, motorcycling, and RVing.