Orelikon and CS/AA-3 purchase was about equipping 48th Ad hoc ADA regiment and 57th Ad hoc ADA regiments. Afaik, those are under 6th and 7th Independent ADA Brigades. (along with 43rd and 44th SHORAD Regiments equipped with FM-90s.)
On the other hand, we have 120+ type 65 & 74 autocannons with maneuver formations. Replacing them would require 20-30 modern AAA systems. We only bought 3. (Two CS/AA-3 batteries and one Rheinmetall Skygaurd 3 battery)
20x batteries of...let's say....Korkut SPAAG would require around $ 500 millions. That's huge investment for the army in single category of ADA. I don't think we would see that before 2030.
