Just remind me when the last time landbased air defence was essential? A lot lot longer ago than 1982, yet still we buy vast hordes of Typhoon.
1. The Gulf war of 1991 - including the initial rapid deployments to protect Saudi Arabia from further Iraqi aggression
2. The enforcement of the no-fly zones over northern and southern Iraq 1991-2003.
3. Operations in the Former Republic of Yugoslavia 1993-1999. (Deny Flight, Deliberate Force, Allied Force)
4. The Gulf war of 2003.
In every case there was a credible air threat and none of these operations could have been carried out in the way that they were without the complete air dominance obtained by mainly land-based DCA and associated combat support aircraft.