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...some of them (the better ones), work OK on touring bike setups. But the additional cable housing just complicates life, and the simplicity of DT shifters is aesthetically more pleasing. They presuppose a rider who is reluctant to bend down and reach for a DT shifter, so in that sense, if you have ridden better bikes from the 70's and 80's, there's a tendency to consider them as requiring less skill. I know it's wrong to be judgmental, and I struggle with it.