Android 14 aka Upside Down Cake was released on 4 October 2023.
It is supposed to have AI integration for Google Assistant and Photos. Notification flash is now baked in.
The lock screen is more customizable and it seems that the phone can be used as a webcam. Most of it is in “improving the performance and efficiency of the platform”.
Usually, Google is good with the releases, possibly with a minor bug or a power drain. This time it appears there is a major storage bug triggered by multiple user profiles. link