Originally Posted by
SlimRider
Apparently there are two problems with drum brakes.
First they're rare, so any repair will be more expensive. As time continues on they will become even more rare and expensive in terms of both parts and labor. Finally, the drums are heavier than most other braking mechanisms.
- Slim

Rare here in the U.S. for sure, but not so much globally.
Drum brakes are heavier and require a bit more effort when removing a wheel to change a flat. But if one lives in relatively flat area and has no interest/aptitude/time to learn how to constantly adjust rim brakes, then they make sense.