This is hopefully a quick feature, but it will be very valuable. We sometimes need to track down a missing cart or order that goes missing for some reason or other. It's difficult to do so after a cart or order is fully deleted.
Sometimes we have luck looking in EcomOrderDebuggingInfo if the user's IP is known and current. But IPs change and that doesn't always work.
It would be nice if there is always an entry added to EcomOrderDebuggingInfo when a cart is created. It should include the OrderDebuggingInfoOrderAutoId and the user's AccessUserId. That would let us see all carts ever created for a particular user.