I still do not understand why I would ever use #LayoutBuilder in #Drupal10. It seems like a step back to the old days when we were using html tables to lay out a page, rather than starting with semantic structure and then applying styling.
Look at the umami demo: Visually, you can see that these four blocks fit together in a section that contains metadata about the recipe, but there is no way to indicate they are a semantic section and provide an h2 title using the interface.
Explore How Symfony Station was built: an adventurous exploration of layout solutions. It’s an adventure story (aka case study) of how Symfony Station was built and the research behind each decision. It also functions as our about page. 🙂