I think one's perspective changes the longer one has been smoking pipe tobaccos. When I was starting out these various brands were the products of separate and individual entities, and their products reflected that. Components were aged for years before and after blending, often undergoing fermentation, and the flavors reflected that.
Today's pipe smoker faces a very different reality, one where a corporate behemoth has bought the IP rights to a lot of names, using the same sources to make their range of blends and as a result, the blends have lost some of their individuality. Loss of subsidies has pushed a lot of growers to abandon their traditional crops and to turn to growing more profitable and less labor intensive crops. So there are fewer sources than there used to be. Economies of production, like machine harvesting as opposed to careful hand harvesting also affect the result.
We've seen blends go out of production as a result, a recent example being Watch City Slices, because the particular variety of leaf, or quality of leaf, isn't available to make it and its maker isn't going to pretend that it can still be made. Then as now, component quality is variable. Just because a blend uses St James Perique doesn't guarantee it's good St James Perique.
People getting into pipe smoking in today's world will imprint on what's available, just as I did when I started smoking pipe tobaccos 50 years ago. But what I imprinted on is different and many of today's blends I find lacking, especially modern versions of blends that have been around for decades. That's why I can't stand today's Balkan Sobranie. It's not the Balkan Sobranie I smoked in the past, not by a long shot. Same with what's presented as Escudo. It's not the Escudo that I smoked years ago. For me, they're just a name on a tin of "whatsis".
For people who didn't experience these blends as they were once made, it doesn't matter. If you like what you're smoking, that's really what counts. Today's St Bruno isn't the Ogden's St Bruno because the base tobaccos are different. Fortunately, I like this version, so I enjoy smoking St Bruno.
Having stocked up on blends that I liked allows me to continue to enjoy blends that are either no longer made, or made in a way that is no longer recognizable as what they once were.
But just starting out, I probably wouldn't have these considerations.