I have built many sites using ACF Flexible Content field and created pre built components – image slider, faqs block, triple horizontal images, quote etc etc – basically giving the user the option of building a much richer page than possible with just a single wysiwyg field while maintaining some sort of content control. My issue has always been you have to either output the core wysiwyg content before your group of flexible content elements or after or alternatively you disable the default editor and build flexible content elements for paragraph of text, paragraph of text with title etc etc. My question is, with the release of gutenberg and the ability to create custom blocks within it, has this become the standard for creating multiple element content or does ACF flexible content still have many advantages over it?