The recommendation for object storage was recognizing a transmitting
domain needs to allow random access to a sizable array of data
objects. This is not a simple problem to scale. The advantages of
such a solution would be improved security, provide optional privacy
without directly encrypting the message, eliminate DSNs, and a reduce
network bandwidth when tighter size limits are placed upon header
only notification while 80% of the email is spam. Consider the SPF
warning added to enforce that made by IESG, in addition to being
categorized as experimental.
-Doug