tl;dr:"The React 17 release is unusual because it doesn’t add any new developer-facing features. Instead, this release is primarily focused on making it easier to upgrade React itself."
tl;dr:Includes a video of Dan's presentation, the basic premise is that code that's free of duplication leads to software we can't understand. Violations of DRY are WET - “write every time”, “write everything twice”, etc...
tl;dr:Developers strive for cleaner code. There's an inflection point when a developer starts writing code in abstraction, this feels like a "super power." Dan learnt this comes with its own trade-offs. "Clean code is not a goal."