> This is how invention is done.
> It seems designs can be iterated on and tested in just a few days.
> In today's aviation world, if an idea can make it into the air in less than 5 years it's a miracle. I don't see any substantial innovation happening in the aviation world for that reason. Planes docking side by side to save fuel like this would be amazing for the environment, but will never happen.
There is a significant and substantial amount of innovation happening in aviation, from down to gliders and ultralights / experiments all the way to aircraft that can "fly" in what is technically outer space.
I'm not even sure where to begin to highlight the advances in technology, simulation, manufacturing, materials, training and just plain ol' understanding of chemistry and physics that has happened - which allows you to get on an aircraft and be hundreds or thousands of miles away for pocket change.
Please don't let the recent articles around the 737 airframe cloud your judgement - the 737 NG and the 737MAX are very, very different aircraft in terms of their composition, materials and technology than the original that was introduced a couple of decades ago.
More to the point - there is absolutely nothing stopping you from buying some sails, an electric motor and batteries, putting them together and going flying under the experimental ultra-light category.