The Harrier was supposed to be a "hip-pocket" jump-jet deployed with the grunts close to the front in the dirt, in the jungle, in the "sand". It never happened as originally envisioned.
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There's a new book on the Harrier legacy due out by USNI soon and it covers the start to finish ops...I have the advantage of knowing something of what it says because of editing it recently for the author. And in fact-checking, I discovered that Harriers did indeed go ashore in OEF and stood strip alert at Kandahar...they prefer semi-prepared strips (FOD hazard too great otherwise), but they were ashore where no other jets could go and provided a unique rapid response capability. I discussed that development with the then Harrier PMA and JSF folks...if Harrier never validated that capability, then it really took a leg away form the STOVL variant of JSF other than being able to provided fixed wing TACAIR for LHD/LHA ACE.
Then came OIF and the Harriers went ashore in a big way and used FFARPs alongside their rotary bretheran. Additionally, two amphibs were turned into "Harrier Carriers" operating nothing but. They did validate the opsconcept.
As to long tortured path of Osprey, it was never a program for years, but congress would insert funding and direct Navy to use it...that doesn't help in a big way...mishaps are tragic especially fatal ones, and I hate to say they are part of the cost of doing business, but that is what the Right Stuff used to set the stage for test pilot moxey...going to funerals. The norm of aircraft development has been to lose aircraft, but it is getting better. F-22 took just about as long and Comanche...would have, too, but someone finally out it and Crusader out of their and our misery.