WordPress 4.3 “Billie” drops today after a lot of hard work and determination from the Core WordPress Team. Good job everyone! If you host your own WordPress site, make sure to update your WordPress site as soon as possible!
Make sure to test your custom themes and plugins though.
Here is the announcement blog post on WordPress 4.3 on the WordPress.org blog.
Here’s the video for WordPress 4.3
Here is the WP Tavern article on WordPress 4.3