With each release of software, there seems to be little things that change, but are either not documented as a change or the documentation on being a change is buried and difficult to locate. In Revit 2020, there are some changes in the built-in parameters for families when they are placed in a project file. These changes can come into play when using automation, such as Dynamo. While they may or may not have much impact on your particular usage of Revit, it is important information of which to be aware.
Applying Technology to Architecture 