It's funny because a few years ago I read about how the developers of a game from the same studio -- specifically StarCraft -- ran into the exact same problems I did when trying to write a game in the then-common "bag of subclassed game objects framework" in the 90s. To this day I thank the gods that I chose ECS for my latest game because it has made changes, bugfixes, and extensions of functionality so much easier. To say nothing of more data-driven.