Today, jQuery is no longer the leader in web development, but it has not disappeared. It still powers millions of legacy websites and remains deeply integrated into platforms like WordPress and Joomla. Many older projects still depend on it, and countless plugins continue to exist in the ecosystem.
However, for new large-scale applications, developers usually prefer frameworks like React, Vue, or Angular. jQuery is now seen as a library best suited for small projects, quick prototypes, or maintaining older systems.