An airplane is nothing more than a formation of aluminum compromises

I flew a Seeker Seabird recently in New Mexico. It is an example of an airplane that is built and certified to fulfill a simple mission and it does just that. The Seabird is a plane with few compromises to the design objective. It is built for going slow, looking around and doing it all remarkably inexpensively. It is 3 for 3 towards those objectives. It sort of begs the question why can’t more aircraft (products) do this?

The Pilatus PC12 comes to mind as another aircraft that meets its design objectives. It hauls people and stuff as if you are packing a Chevy Suburban, does it as fast as turboprops with two engines and is measurably more comfortable inside than other single engine turboprops. Ok, there are two airplanes that fulfill their Marketing Requirements Document. Are there others?