Did you read the article either? > While it would be really hard to describe here in detail all of the new features, the code architecture improvements enabled

Did you read the article either? > While it would be really hard to describe here in detail all of the new features, the code architecture improvements enabled by the React v16.8 Hooks functionality are so significant that it will eventually become harder and harder to recruit developers interested in working in a pre-Hooks codebase. In order to keep up with the rest of the industry and provide our current developers with the best tooling available, I believe it should be a high priority to enable use of Hooks and other modern React functionality. This definitely isn’t anywhere close to the only new feature worth upgrading for, but it does represent an extremely large shift in how developers will be able to write React code.