When I learned about ECS, I realized that Tablizer (old Slashdot guy who insisted that OOP was a dead end and "table oriented programming" as was done in FoxPro was the way to go) was probably right. Using an ECS for my Android game was a bit more cumbersome, but paid for itself many times over with the ability to create new kinds of entities, implement familiar behaviors for them, and add new ones without code copypasta or inheritance tree entanglement.
I tried that too, I called it "agents". (This was long before AI-mania.) An agent was an object that handled some aspect of behavior (like gravity and collision physics) "on behalf of" some entity, hence the name. The word I was actually searching for was probably "delegate", but I was a stupid 20-something.
ECS is to me still conceptually cleaner and easier to work with, if more tedious and boilerplate-y.
