When using SonataAdminBundle and SonataBlockBundle, I wanted to remove the default block.
It doesn't provide much benefit, as it simply duplicates the functionality of the side menu on the dashboard.
When installing SonataBlockBundle, if we simply write in the configuration:
sonata_block: default_contexts: [sonata_page_bundle] blocks: 
(in the future we will add our own blocks, but for now we just leave an empty array), we will catch an error.
As a backend, SonataAdminBundle is used. Implemented:
1. Admin panel (WYSIWYG, ckeditor), image/audio uploading, player.
2. Tags, categories, archives, tag cloud
4. RSS-feed (requires modification)
5. "Smart" caching of everything, content is served very fast
To "ease the soul":