Thank you for the review, @strid3r!
You’ll be pleased to hear that work continues on other areas of WordPress while Gutenberg is being built. The security team fixes Core issues as needed, and we’re also looking at ways to improve the security of the wider WordPress ecosystem. Automated scanning tools like Tide will allow us to notify plugin and theme authors of potential issues before they’re exploited.
By itself, WordPress has reasonable SEO, but much like many other areas, using a plugin dedicated to SEO ensures that you get the most up-to-date best practices, rather than waiting for Core releases.
Speaking of SEO, several folks from Yoast are quite excited about applying SEO feedback at a block level, it has the potential to give you much finer control over your content, control that just isn’t possible in the current editor.
Finally, I do disagree that this is about “$”. From a user perspective, Gutenberg provides a modern, fast, flexible experience that site builders and content creators expect. From a developer experience, Gutenberg unifies how we treat data across the entire site, making it modular, and aligning the various APIs.