F900, the passenger-carrying "business model" is fairly standard here in the States and is the primary reason that many (most?) of the larger warbirds are in operable condition. Paying passengers make it feasible for the aircraft to tour the country, in turn allowing large numbers of people (of all ages) to tour the planes and see them in flight. The benefits of that might be hard to measure but are, I believe, worthwhile. A surely incomplete list of aircraft available for rides includes: B-29s, B-24s, B-17s, B-25s, Ford Trimotors, Beech 18s, as well as Dauntless, Avenger, Helldiver, P-51s, P-40, various trainers, etc.
That the accident claimed lives is tragic, and we can assume that it will happen again at some point in the future, but what happens in between is magical. Should any additional restrictions emerge because of this accident, I hope that they are well thought out and not merely a knee-jerk reaction.
Boeing B-29 Superfortress NX529B Fifi by
Mark Carlisle, on Flickr
Consolidated B-24 Liberator N24927 "Diamond Lil" by
Mark Carlisle, on Flickr
Bomber Gaggle by
Mark Carlisle, on Flickr
Boeing B-17 Flying Fortress NL93012 by
Mark Carlisle, on Flickr
Ford Trimotor NC8407 by
Mark Carlisle, on Flickr
Boeing B-29 Superfortress NX529B Fifi by
Mark Carlisle, on Flickr