Duragrouch

A dichotomy; IGH with drum brakes, need maintenance less often, but when you do, takes much more expertise, to teardown and reassemble either. That's my rationale for sticking with derailleur systems (and I grew up on 3-speeds, even tore one down to fix it in my early teens, but needed a workbench to do so, something lacking in my current living arrangements). Rim brakes, while simple, I'm less enamored with, given that my surrounding terrain has some long steep hills, so brake use wears the rim sidewalls, and can even overheat rims to spoke pops; My next bike will have discs, hopefully with replacement pads available as cheap as rim pads.