As in anything, initiates go through somewhat predictable stages:
They may begin with a Grabow or a cob, then graduate to mid-range factory pipes like Savs or Petersons (at which point they begin to look down their noses at their humble beginnings, embarrassed of their Grabows and cobs), then eventually they acquire some workshop and artisan pipes.
But finally, when they are well established and have nothing left to prove... they realize that they liked a couple of those old Grabows and cobs after all, and begin to smoke them again.
I've got a Grabow and a cob racked right alongside my Vesz, Soren, Karl Erik, and Jeremiah Sandahl, and I reach for them just as frequently.
A small percentage of any pipe demographic will surprise us with failure which nobody could have predicted. But if a significant percentage of Grabows failed like yours did, Grabow wouldn't be in business.