While I did not keep my last system, I have a very good memory of it as I had it without changing a component for six or seven years. My design goals were very different.
My old system, while sounding very good, was exceptional at highlighting details: the venue and mastering techniques… these stuck out. The bass was fast and slam substantial. My system now is actually more detailed, but it is not, “in your face”. The system is much more musical, with tremendous mid-range and bass bloom… in exchange for slam the details of bass are separated into individual components. The rhythm and pace excel and it is difficult to pull myself away from it. It has a deep rooted emotional connection with the underlying music.
My design goals changed when I started listening to live acoustic music weekly. Fundamentally these are two completely different sounding systems: the new one much better in every way.