One of the tasks that will happen more and more with time will be to convert existing WordPress websites that are based on third-party builders (Elementor, Divi, ...) to the new native builder of WordPress: Gutenberg.
The benefits are cost (if you paid for a full license of a builder), support (you won't risk compatibility issues by updating WordPress) and performance (most if not all contents of the pages are computed once on-save, instead as once on every load as with builders).
However, the switch is not easy at all from a developer perspective. The user experience can also be way worse, and some blocks required for the conversion may not exist.