Good post.
This is probably a good way to look at it. Described as the accelerating return only creates controversy. I have been thinking about this as of late.
Looking at my enjoyment, it increases with greater sound quality… a lot. So, for instance I will not listen to a $10 radio… I will listen to a $2K system… but not realy enjoy it, but I start getting into it say, at $10K (I am using $ as a proxy for sound quality… let’s not get side tracked). My enjoyment increases with greater sound quality, faster than cost. Hence, my lifelong commitment to better system… the better… by far giving me greater and greater enjoyment.
I tried an elemental plot (overly simplified for folks that don’t look at charts daily.
the point is, for audiophiles, pleasure increases rapidly and continues to increase faster than cost.