There's only so much mileage one can get out of half a dozen aircraft filmed from all different angles but repeating the same stuff over and over again. If those precious relics weren't capable of safely doing their stuff then I can't think of a better justification for special effects. Indeed I find myself in full agreement with others who lament how this film totally failed to do justice to the magnificent scale of the achievement of withdrawing well over 300,000 troops from that beach in a matter of days, while under fire. This wasn't DUNKIRK, it was personal glimpses of Dunkirk by some of the people who participated in the evacuation. My suggestion would be to recut the film to show the intimacy of the different situations portrayed and reissue it under the title "Personal Stories From The Dunkirk Evacuation". Then it might be more appreciated and avoid the deserved backlash over the very false banner it was released under.