Is that 5-10x the upfront cost? What's the cost comparison in operating costs over the lifespan of the plane? It's not that I don't believe 5-10x, it's that I

Is that 5-10x the upfront cost? What's the cost comparison in operating costs over the lifespan of the plane? It's not that I don't believe 5-10x, it's that I'm pretty sure the net savings are on the backend, which is where a huge amount of airplane engineering has gone--better fuel efficiency, faster servicing, etc. I'm not an expert in this area, so I'm genuinely curious.