The 747 turns 50 this year. The development costs back then almost bankrupted Boeing.
https://www.economist.com/gulliver/2019/02/13/the-boeing-747-jetliner-turns-50
Yep. Boeing bet the company and almost lost it. Amazing machine for the time. The 380 was all CAD designed. My company used to make 747 parts from the original hand drawn prints.