[nutpants]

The latest info is that Pixel 6 devices are not downgrade-able after updating to Android 13, the bootloader is BLOCKED from being downgraded and Android 12 crashes anything to do with DRM

Pixel 6 series only AFAIK (that means you cant switch to any current custom rom on A.12 either until they update)
you have been warned (but not by google)

Wtf. - “Warning: The Android 13 update for Pixel 6, Pixel 6 Pro, and Pixel 6a contains a driver update that increases the anti-rollback version,” google said. “After flashing Android 13 stock on these devices, you will not be able to flash older versions of Android 12.”