This is one of my favorite Gutenberg plugins (meta-plugins?) and a perfect example two of its main paradigms: Building on each other’s work (standards) and Avoiding lock in effect (content integrity).
What his plugin offers is pret-a-porter set of layouts, using the Gutenberg’s default blocks. This makes it A LOT easier to build layouts, get to know new blocks and even to get inspiration on what to build.
One of the beauties of this plugin is that it only works as a “wizard” to create your page. Once your layout is ready you can delete it, as it does not add any functionality and is only using the default blocks.
I am thinking that, if built correctly, a plugin like this could allow other plugins to “add” their blocks to it, creating new layouts with the newly installed sets of blocks.
This way it would be exponentially simpler to become familiar with new sets of blocks and create layouts using them in the way their author conceived them.