The Developer Preview is just that. A very early look-see for app developers to get a look at Android 12 and to start making adjustments to their apps. It is not a fully fledged firmware and nor is it intended as a daily driver since a lot of features will not function.
Samsung will issue a Beta firmware for users to test later in the year when they have adapted it for One UI. This will be probably around late September or October.
Looks promising but still early in the day, some tools to look out for include the compatible media transcoding ,AVIF Image support and Haptic Coupled Audio Effect and Multi Channel Audio. Another article here https://www.androidcentral.com/android-12