We are trying to do the following and I wonder if we are thinking this correctly.
Is this something possible? Do you have any performance concerns if the Delivery is a bulk campaign for millions of subscribers?
The table we are appending to could get large, do you have any recommended limit for your tables?
My understanding is that this is possible.
If we have server-side JS, this would mean that no JS will actually appear on the client side.
I think it's not recommended to use scripts in the body of an email for several reasons, the main one being that some email clients don't process it correctly, which may impact hugely your deliverability.
I'm not sure what you are saying is possible but it should be not too far from what's described here: https://docs.campaign.adobe.com/doc/AC/en/DLV_Content_management_About_content_management.html
Hope this helps,