Hindsight is 20-20 vision, but I still find it amazing that de Havilland's had to really fight to get the Mosquito accepted by the Air Ministry. All bombers had to big, made of metal, and have lots of guns, and because the Mosquito wasn't any of those things...
I often wonder how different the bomber offensive may have been had the Air Ministry not been so blinkered, and had decided to order the Mosquito into production much earlier than it had, and possibly instead of so many four-engine bombers.