This is a major feature for larger websites. What happens to complex Wordpress (or any other CMS) sites with hundreds of articles and dozens of categories? It is impossible to match that amount of records manually.
Not having the ability to import all the content and match the article with the category collection, is a deal breaker for most clients. The Option field is not an alternative because it doesn't generate dynamic pages.
Please, please, please consider adding this briefly.
I'm voting for Webflow being a true Wordpress competitor. This is really a must have.