If you smoked it once a day - I would guess it started smoking wet after a couple weeks and if you cleaned it regularly the tobacco started tasting flat and a lot of the subtlety was gone. Wetness became an issue with increasing dottle as moisture made it more difficult to smoke to the bottom.
About your premise that most men had one pipe that they smoked all day every day. I would ask, are you sure? Did you know anybody that did? My grandfather and great Uncle smoked a pipe. Both their collections were fairly modest. My grandfather's had a 7 day rotation mostly a similar shape, 1/2 bent Dublin, but some were blast, smooth, or rusticated but he was unusual in that variety I came to find. My great uncle is what makes me challenge the myth. He passed when I was a teenager, he always had a pipe going and I thought it was always the same one always with the same tobacco. We always went on at least one camping trip every summer. He taught me a thing or two about woodworking and made much of what you could see in his home. My great aunt, his wife who still survives him, taught me a thing or two about confectioneries and baking. I knew them well. Long after he passed, and I was smoking a pipe myself, I asked how he could stand smoking the same pipe over and over again. I knew I couldn't. She Just laughed and said, "He wasn't a selfish man, but he did like himself." She then walked over to a built in sideboard in the breezeway and opened a cabinet where there were what looked like at least a dozen pipes all of the same make, shape, and finish. She then told me a lot of men would settle on a favorite brand and model and a favorite tobacco and just have enough of those to fit their needs. I started asking around, one old duff looked at me as if I had all the sense of a sack of hammers and said, "I wore a pressed white shirt every working day of my life, you think I had only one?" some guys may have had a pipe they smoked to ruination and replaced but I couldn't find any, so it would seem the exception rather than the rule.
Bearing the burden of responsibility..... It's probably my fault.
Treat your silver as if it were earthenware and your earthenware as if it were silver - Seneca, Letters of a Stoic