Flying sequences like those in BoB are unlikly to be done again due to the cost and lack of aircraft. Sequences that invole a mix of both are the best way forward if done well.

People can pick films like Pearl Harbour to peices but you can’t get away from the fact there are some great flying sequences involving real planes. (P40 at sunset and Doolitle B25s taking off being my favourites)

The money those owners recieved from the filming keeps them flying, thats what matters!!