Points taken, just not necessarily agreed with. I'll stand by my TFX/JSF comparison; the multi-service element was the problem with TFX, trying to marry the navy & air force requirements into a (nearly) common airframe made the F-111 problems inevitable - thankfully, as you said, it ventually matured into a very fine strike aircraft. JSF has some of the same issues (multiplied, due to international involvement) and, yes, it will undoubtedly mature into a very capable aircraft.
Picking up your comment "ultimately the capability, reliability/safety improvements over the Harrier are like night and day". I mentioned the P1154 earlier; the best thing about that project (another one where inter-service rivalry was an issue) was that when it was ended Hawker were given the go ahead to develop the 'basic' Kestrel design into the Harrier; the relative simplicity of the Harrier (apart from the engine/flight mode obviously) was what made it a success, I doubt the USMC would have been interested in P1154, but P1127 was perfect for them. Over time Harrier grew in capability, with laser designation added, the advent of the Sea Harrier, the AV-8B; but that underlying simplicity remained, which is what made it so flexible.
And I never said that one size couldn't fit all, what I'm saying is that if that size is dictated by a committee then you have problems; TFX, JSF, Tornado, Typhoon, all utlimately successful but all a sight more complex than they probably needed to be, due to the compromises involved. The Phantom was designed initially for a clearly defined role, carrier based interception; but because McDD's design was so good & so well engineered it proved adaptable to many other roles; the F-16, the F-17/18, the Harrier all great aircraft, fulfilling many roles, but working from a good basic design. Probably the classic example is the Hawker Hunter, designed as a basic day interceptor and still providing useful service in many roles over 60 years after the 1st flight of the prototype - good, basic engineering will always win out.
I hope the F-35B does prove to be a success; the V-22 faced cancellation so many times, but has now really started to prove itself.