it's not about simplicity but using right materials for how long you want something to last in a given environment.  jumbo jets have a design life of 15-30 years and that's with CONSTANT USE, racking up tens of millions of miles.  by contrast most consumer products are DESIGNED TO BREAK ( planned obsolescence ) as well as to be non-repairable.  under capitalism you will always be sold the worst quality product that you're stupid enough to buy.  apparently airlines are smarter than the average Tesla buyer.