The block editor transforms complex content creation by moving functionality from meta boxes into the main editing interface. Users see how their content will appear on the frontend while editing.
Content-related fields move into blocks while true settings remain in meta boxes. This creates better user experience and more logical data architecture.
The block approach prepares sites for full site editing, where the entire page becomes editable through blocks. Focus on creating excellent user experiences rather than just replicating existing designs with custom blocks.