Not every country is sanctioned equally: Iran is flying mostly western planes, and there were plans to buy more: https://en.wikipedia.org/wiki/Iran_Air#Future

Not every country is sanctioned equally: Iran is flying mostly western planes, and there were plans to buy more: https://en.wikipedia.org/wiki/Iran_Air#Future_fleet_plans https://en.wikipedia.org/wiki/Iran_Air#Future_fleet_plans DPRK is only flying Russian planes: https://en.wikipedia.org/wiki/Air_Koryo#Current_fleet https://en.wikipedia.org/wiki/Air_Koryo#Current_fleet As a reminder, Russia lost overnight 78 planes: https://www.reuters.com/business/aerospace-defense/russia-says-78-its-aircraft-have-been-seized-abroad-ifax-2022-03-22/ https://www.reuters.com/business/aerospace-defense/russia-sa... (Of course, Russia also seized planes that were on its territory ) And due to other sanctions and boycotts, lessors are unable to keep their contract up and be paid from Russia (so, Russia is either forced to return the plane, or seize more... Since they already got comprehensively sanctioned, there's not much point in the former) Also, of course in the long term some countries are going to try to rely more on domestic/friendly production, but Sukhou planes apparently have lots of foreign parts, so switching to use only Sukhou isn't feasible nor a silver bullet