Technology has to be pushed to the limits. Airlines want less weight, so they use less fuel, therefore reduce costs. Manufacturers Airbus and Boeing strive and compete with each other to achieve this. Pushing the boundaries results in problems, so both the 380 and 787 have come across snags. They will throw money at the problem until they get it sorted. Pushing the boundaries, can mean taking risks. So far no disasters, I'm sure they will get it right in the end.