Feel free to insert an analogy that pleases you. WordPress.com is a hosting company that has its own staff and contributes approx 40 hours per month to the WordPress open source project. WordPress core development is made up of contributors. The AI builder is not available for WordPress, it’s exclusively for the hosting company WordPress.com. WordPress.com on their basic plan restrict any plugin usage. There are no usage restrictions on the open source software. This is just a taste of the distinctions. The title of this post has now been updated, but regardless, WordPress.com is not WordPress.