Many successful fighter aircraft, eg F/A-18 Hornet, have 2 crew (pilot and navigator), which (from my albeit limited research) gave great benefit in complex situations especially involving ground defences.
The F-35 Lightning II is supposed to be multi-purpose, but has only 1 crew - why?
- Do the advanced electronics compensate for the lack of a navigator?
- Would the design (aerodynamics/frame) be compromised by adding another seat?
- Something else?