Ture - I have a closet full of FAA-licensed drones - and others. All the modern cheap GPS, accelerometers and brushless motors have been a revolution. Making it all human scale and reliable and safe under all the possible failure modes (especially loss of a motor when you can't auto-rotate) and hanging the aircraft off of whirling machinery is where the heroism comes in. The V-22 had lots of problems and is still a bit of a nightmare. That Moeller flying car with ducted fans everywhere was a mess. There were many others in all shapes and forms. Each had its own unique way to kill you. Dale's approach simplifies many things but also has its own unique new challenges.

Andy