"Seems like the OP hasn’t much to say with so much positive being said about integrated amps."I think that OP got the answer he was looking for. Integrated amps seem to be liked by many and not only as a recent marketing plot by manufacturers. So far, responders have given a variety of reasons why they like them and praised amplifiers in wide price range (roughly $1000 to $16000, without re-reading the thread).
In fact, it seems that everyone responding has had an integrated amplifier at some point, Even those who now prefer separates. Which makes "...new market niches to move product." probably not the case.
In short...
"...does a significant market segment truly prefer the idea of an integrated?"Yes.