In reply to Shaun.

Hi Shaun, sorry but I think you're wrong :)

If you check my comment above, I show that you can actually extract the metadata from the Gutenberg blocks, down to a single block from any post.

Of course the idea is not necessarily to use your blog post as the single source of truth of all your data. Sometimes it will not make any sense, such as storing references across different entities in the database, for which you may want to rely on ACF (or something else). But in other cases it can perfectly make sense.

For instance, if you want to retrieve the collection of all Youtube videos embedded in your blog... instead of duplicating this information somewhere else, since you already have this info in the Gutenberg blocks in your posts, you can already extract it from there...