Bruce Lilly writes:
Because different UAs have different feature sets, they necessarily
require separate configuration.
Your argument is disproven by, for example, clients using IMSP to share
address books.
Your argument is also, on its face, mind-bogglingly stupid. Even if you
had never heard of shared configuration before this, how could you claim
that it can't be done?
Reconfiguration every time a list subscription changes. A PITA.
You aren't answering the question. Yes, changing a list subscription
takes effort; why do you think this is a problem with Mail-Followup-To?
---D. J. Bernstein, Associate Professor, Department of Mathematics,
Statistics, and Computer Science, University of Illinois at Chicago