If you install the entities package into a project and you have a DLL that has a copy of the System.Runtime.CompilerServices.SkipLocalsInitAttribute in order to use the C#9 feature for it, you'll then get an error like this:
Library\PackageCache\com.unity.entities@1.0.10\Unity.Entities\Iterators\EntityQuery.cs(3224,10): error CS0104: 'SkipLocalsInit' is an ambiguous reference between 'Unity.Burst.CompilerServices.SkipLocalsInitAttribute' and 'System.Runtime.CompilerServices.SkipLocalsInitAttribute'
Could somebody from the Unity Entities team either make its asmdef use Override references to avoid it automatically referencing user DLLs, or add using SkipLocalsInit = Unity.Burst.CompilerServices.SkipLocalsInitAttribute to have the compiler use the original attribute?