mark-demoss

Two years on, this feature is still not documented. Is it considered safe and supported for use in CF applications? Is there any move on Adobe's part to expand support...

Will do. I also have an open support case and will let you know what I hear back.

https://tracker.adobe.com/#/view/CF-4212587

Adobe has updated their documentation: https://helpx.adobe.com/coldfusion/cfml-reference/coldfusion-tags/tags-a-b/cfargument.html