I would not expect that just because you owned and liked a speaker for a long time you would perceive differences as flaws. That has never been my experience. I have heard a lot of speakers in between purchases… some sounded incredible (but not ones I wanted) some sounded incredible and sounded more like what I wanted. So, I changed brands.
For me, I appreciated lots of different speaker systems, bought a few. However, for me, Sonus Faber has a realism and musicality that is far superior to others. So for me that is true… but not because my last three sets were SF, but because they perfectly fit my desired sound characteristics.