Insurgent warfare isn't something new. As noted, all aircraft are at risk for it.
Quite correct, except as Bastardeux correctly surmises I don't need a couple of hundred million bucks worth of otherwise unwanted technology in that case. I'll just arm up some turboprop trainers in the COIN role - hey wait a minute! What does COIN stand for again? And yet here we are in year 10 of continuous COIN ops and still no dedicated COIN platform.
To reiterate my main point, if the capability isn't tested and proven in Combat, it's going to be harder to prove it was ever relevant.