WordPress 4.9.6 has been released, thanks to the work of more than 70 people who added over 95 updates. Among these updates are the prominent additions of privacy and data handling tools, thanks to the upcoming deadline of the GDPR on May 25.
A WordPress 4.9.6 update guide is available with more information, and there is a separate guide directed to theme developers. Developers should also note that 4.9.6 includes some new PHP polyfills.