I attended a 30 year vertical of Zind-Humbrecht Pinot Gris Rangen recently. Over the course of that event I picked up what I felt was a terroir signature of the Rangen, which I appreciated on an aesthetic level and in comprehension. I also noticed something that I wouldn't have otherwise, which is that the texture of the wines varied widely between cooler and warmer vintages. I asked Olivier Humbrecht about his pressing regime. It turns out that he presses for much longer (in terms of hours) in the warm vintages, and for less time in the cool vintages. This in turn relates to his idea that you should develop tannins from skins in wines which have lower total acid.
I never would have noticed this if I had tried the wines singly, because on their own they were different in their own way, but together they were different in the same way.
I like verticals, and the idea that someone would criticize someone for enjoying what they can learn from a vertical is... entirely ludicrous.