JavaScript's object-oriented programming (OOP) capabilities have come a long way, with the introduction of class syntax and improved support for inheritance. By mastering OOP in JavaScript, developers can create more organized and scalable code, leading to easier maintenance and faster development. With the use of classes, developers can structure their code in a more intuitive and reusable manner, leading to greater code maintainability and easier collaboration among team members. Furthermore, the ability to leverage inheritance in JavaScript allows for the creation of hierarchies of classes, making it easier to manage and extend complex codebases. In conclusion, mastering object-oriented programming in JavaScript is key to building reliable, scalable, and maintainable applications, and is a skill every JavaScript developer should strive to acquire.