To bring the coaster brake back from the mountains, where apparently anyone who has a bike with such a brake is forced to go, here is the mountain-free zone where I ride.
No frozen brake cables or calipers here
Still looking for those mountains
At last, a slope, maybe I have now found the foothills, onwards and upwards!
Two of the great things about riding without lever operated brakes is that your hands can remain securely on the handlebars, and then on loose or slippery downhill sections going sideways is always an option. In terms of maintenance it is certainly no more than for servicing and adjusting rim/disk brakes and wheel bearings. I usually have a spare set of wheels hanging in my garage in case I want to switch between road and off-road tires, and while they are off I might spend an easy half hour or so cleaning the wheels and repacking bearings, at least annually.