I have pipes dedicated to VAs, to VAPERS, and to English/Balkans. I have several "beater" pipes that are more or less dedicated to Connoisseur Flake from Park Lane. These are my "yardwork" pipes and CF is an effortless all day smoke with great flavor, especially aged, which seems to work well when I'm outside doing stuff. It makes sense to me to dedicate pipes to classes of tobacco to minimize ghosting. My rationale is that pipe tobacco is expensive and, if aged, limited, so why waste it on a ghosted pipe?