What are you referring to as CD?
So without sounding like a jerk, that doesn't answer my question in any way.
I know Illustrator's .AI is proprietary and thus will never be an export option.
In this exact case, where I am making a logo or illustration in AD's vector format and no other, what is the most correct reply and file to provide? Most print destinations, heck, most of the industry, uses Illustrator and asks for .AI format. What is the reply and standard file format as a user of only Affinity Designer?
That is my question. If AD hopes to be a respected Illustrator alternative used for "serious" work, then there needs to a be clear, concise answer here and thus response for/to the client. See what I mean?