For simple lookups and stats, they are fine, but imagine complex queries. Best use case? Related posts after every post. With 30,000 posts, your generator will

For simple lookups and stats, they are fine, but imagine complex queries. Best use case? Related posts after every post. With 30,000 posts, your generator will slowdown drastically if it's file based as opposed to some JOIN query on an SQL database. We tried this and it didn't work. Related posts is just one example, think of big publishers' use cases - dynamic menus, ad management, etc.