Asking from a civilians perspective....why do we do this to ourselves??

50-60 years ago, new fighters and bombers were developed and put in service at a blindingly fast rate compared to today, and it was okay to have an airframe specialize in a particular mission. And didn't that work?

Why the obsession today with shoe-horning every mission capability into a single airframe when we aren't going to be able to afford the damn thing in the end?

Seriously frustrating.