Well put. Tony Stark initiated the MCU with Iron Man in 2008. Watching him learn how to be selfless, ending with his sacrifice the save the universe — it was a beautiful thing to behold. Heartbreaking, but beautiful and very much earned.
Article source: https://www.cinemablend.com/news/2485445/avengers-endgame-writers-explain-why-tony-stark-had-to-die