You've now learned about the Prototypal model of Object-Orientation used by
JavaScript, natively. These days, most OO JS will be written using class
and the ES2016 standard, but you will likely encounter and might well be
interviewed on questions around the Prototypal model.
While the syntax changes, Object-Orientation does not. We still use constructors to pass instance data, we still write methods that have access to the instance data, we still use objects to help us maintain intelligible code. The only difference is how you write the class and how you instantiate the instance.