ES6 でクラス構文を使用することの、従来の ES5 コンストラクター関数アプローチと比較した主な利点は何ですか?

class Person {
    constructor(first, last) {
        this.first = first;
        this.last = last;
    }

    personMethod() {
        // ...
    }
}

function Person(first, last) {
    this.first = first;
    this.last = last;
}

Person.prototype.personMethod = function() {
    // ...
};

// ES2015+
class Person {
    constructor(first, last) {
        this.first = first;
        this.last = last;
    }

    personMethod() {
        return `Result from personMethod: this.first = ${this.first}, this.last = ${this.last}`;
    }
}

class Employee extends Person {
    constructor(first, last, position) {
        super(first, last);
        this.position = position;
    }

    personMethod() {
        const result = super.personMethod();
        return result + `, this.position = ${this.position}`;
    }
}

class Manager extends Employee {
    constructor(first, last, position, department) {
        super(first, last, position);
        this.department = department;
    }

    personMethod() {
        const result = super.personMethod();
        return result + `, this.department = ${this.department}`;
    }
}