Unfortunately, neither Bernard's reply nor any of the discussion of
which I'm aware actually answers the question posed, which is
(paraphrased but correctly) "Why is the IETF (IESG) apparently
intentionally working to delay the deployment of Diameter?". To say
that 'Well, people were working on RADIUS' w/o discussing the reasons
behind that work is just blowing smoke. Having been involved in the
work of at least a couple of the SDOs/trade organizations referred to
(3GPP2 & WECA), I know that the reason for the work being done was _not_
the magnificence of RADIUS but the interminable delays in the
standardization of Diameter. Since those delays were largely due to
IESG actions (or lack thereof), we seem to be wandering a hall of
mirrors rather than in engaging in honest inquiry.