Interesting move (expecially from seller perspective) as the SEO plugin market will be cannibalized by coming core features: https://wptavern.com/xml-sitemaps-feature-plugin-open-for-testing-and-feedback

Many amateur wp installations we have seen use SEO plugins only to register XML sitemap with search engines, all the other features of those plugins is not really used and instead autogenerates a lot of weird meta in many cases.