My bike vendor likes chains. They wear more easily, but are easy enough to maintain and change. Basically everything old school bike like has maintenance/repair advantages.

I'm not sure I agree, but more when compared with belt drive and internally geared hub. But then again, I believe him that those are hard to repair when they fail (even if they are sturdy until then).

I also prefer shaft drive over a chain. Much less hassle and if not punished, can be almost maintenance free. A chain is easily worn and can even rust away just sitting there.

[delayed]