Venezuela is used to illustrate a risk of buying familiar export equipment, even in modernized form. The argument is that NATO has spent 20 to 30 years studying how to defeat many of the systems involved. Upgrades do not erase an opponent's knowledge of the underlying equipment. A new system might buy a few years while an adversary learns its weaknesses. That advantage is temporary, so buying new equipment does not provide indefinite protection.
Notable Point · 27:31-28:16
Why familiar air-defense systems are easier to counter
Modernizing a familiar export air-defence system does not erase the years an opponent has spent learning how to defeat it.