  A new scenario is suggested to explain a large diversity of the AGN radio
properties and their dependence on the galaxy morphology. The scenario is based
on the assumption that the growth of supermassive BHs is dominated by the
accretion only during the quasar (high accretion rate) phase, otherwise - by
mergers with less massive black holes. Following that, BHs are expected to spin
much faster in giant ellipticals than in disk galaxies. Within the frame of the
spin paradigm this explains the observed relation of the radio-dichotomy with
the galaxy morphology. Various theoretical and observational aspects of such a
dichotomy are discussed. In particular, the issue of the intermittency and
suppression of a jet production at high accretion rates is addressed and a
scenario for production of powerful, extended radio sources is drafted.
