Outdated design compared to what exactly?well lets be honest here cobra is outdated design no matter how much we update it .
57 years past when bell designed it
Russian Mi helicopters hold same design For decades and look like flying cows.
Helicopter is a different world than fighter jet. Most helicopters can be upgraded and modernized with equipment upgrades and avionics. If cobra can fire same armament as a more modern helicopter design than it is doing it’s job.
Building “stealth” helicopters is a waste of time and resources for a country that has one of the largest helicopter fleets in the Middle East and doesn’t deploy outside its borders. So iran is absolutely taking the right approach in keeping its helicopter inventory flying yet modernized.
Helicopters and tanks are the lowest priority items Iran needs right now.