Last year he wrote a brief article about bamboo rods for Bloomberg News. In the article he address the mystique of bamboo fly rods, & touches on why some folks prefer them to rods of other materials. When addressing the question of why someone would spend so much more money on a bamboo rod then a modern graphite fly rod, his answers is, in my opinion, really good:
But there’s also some unapologetic nostalgia at work here. Bamboo fly rods can recall a time when life was simpler, fish bigger (and more numerous), and fishermen fewer and farther between. Or so we like to imagine."
One point he makes that I think is really worth mentioning is that a bamboo fly rod will 'break in' as it ages & is used. Bamboo rods have a tendency to 'warm up' after they are fished for a while. I've never been sure if this is the bamboo material being tempered over many casts, or if its a psychological thing where we anglers get more used to the feel & rhythm of the rod. Whatever it is, I know that the vast majority of bamboo fly rods get better with age, where graphite or fiberglass rods will (after many years) wear out. As Gierach puts it:
You can read the entire article on the Bloomberg News site HERE.