"Welcome to modern high end audio.
But yet every year speakers make huge leaps and gains rendering the previous model hopelessly obsolete"
I wasn’t sure if you were making a joke or not so don’t take this wrong if you were.
The HEA market is a very small part of the playback hobby. Long after the over priced, over built era is long gone products like the Quad will be admired for thousands, maybe tens of thousands. The 57 and 63 models, set up well, can hold someone’s attention for hours and days of constant play. Most "modern" speakers haven’t a prayer in doing this before the owners start making "bad recording" excuses.
There are far more listeners who have moved back to proven designs then there are modern purchases.
Michael Green