Why aren't my base styles updating in the preview?
If you're removing styling from a base style, those styles still apply until you have saved the base style.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
Base styles are CSS styles for HTML elements.
Custom styles are CSS styles for classes.
You can create more than one template to provide layout and style alternatives with the use of the template selector.
No, the entity browser does not work for component defaults as the entities are content, not config.
Running the composer update command will update any composer packages that have newer versions available.