Catherine West's RustConf keynote provides a good discussion about why you might want to organise "a program where objects interact" using an ECS system. She discusses the "how you might write it with standard-OOP", some drawbacks to this, and iterates this towards using an ECS system. https://kyren.github.io/2018/09/14/rustconf-talk.html

I like that both this and TFA mention a focus on the data, and "row"/"column" roughly compares to (say) an SQL table. - It's an interesting way of thinking about objects/entities.