When opening an Alteryx workflow that has been saved in a newer version, a warning message is shown, but you are still able to open the workflow, provided that it doesn't contain tools that don't exist in your current Alteryx version.
This does not work for packaged workflows that contain macros, for instance. You have to manually edit the xml of the extracted package file.
It would be great if we could have the same ability with packaged workflows that exists for normal workflows, i.e. the ability to extract and execute them with a warning.