And ES6 classes were designed long before they were implemented, around the time people were making class hierarchies with backbone and AMD modules were the fut

And ES6 classes were designed long before they were implemented, around the time people were making class hierarchies with backbone and AMD modules were the future. The rise of Java and the OOP revolution isn't that far behind us (2 decades seems like a lot in the tech world, but its still within a single generation of humans).