Major Description
There's a number of DAC flags that have been added. The nature of the test framework means that it is very difficult/impossible/incredibly awkward to automate testing for these flags. Fortunately, they are quick and easy to manually test;
-default-file-system-group
-validate-secrets
-validate-storage-classes
-zap-devel
-zap-encoder
-zap-log-level
-zap-stacktrace-level
K8S-2127 has docs for more info.