This belated release brings support for nested blocks into Gutenberg. The list of changes is rather big, so it’s broken up into sections. It also has a new Columns block that leverages nested blocks to operate — it is labeled experimental, though, as it needs further work and has some browser hiccups.
Most notably to the user experience, we are introducing block shortcuts on empty paragraph blocks to streamline the process of inserting content that is not text, while also optimizing for the writing experience. The global inserter, featured at the top of the editor, is meant to become more of a primary way to add content when the user is not writing. Getting this balance right between block creation and the writing flow is crucial and we’ll continue testing with users to refine it.
We are also making changes to how text is synced to the application state, which improves the reliability of the “unsaved” state, the undo mechanism, the ability to dismiss the publish sidebar automatically as soon as you make another edit, and so on.