Since the article mentions graphs, I’d like to ask what would be the advantages of graph databases over relational? Graph databases have become popular in RAG r

Since the article mentions graphs, I’d like to ask what would be the advantages of graph databases over relational? Graph databases have become popular in RAG related topics, maybe mainly GraphRag related work by MS. So I wonder if the same accuracy with RAG could be achieved by traditional databases. Or if graph databases are an absolute must, then what are their limitations? Are there any successful production usage cases of graph databases?