How would you recommend taking care of the coaster brake?
Checking and regreasing it as needed and changing bearings before they wear out completely. Bag of bearings is like $8, thats 5 rebuilds for a hub, tub of grease, $12. You now have enough to make sure the hub keeps going strong for a long time to come.
The main thing to check when you have it open, the wear on the hub brake liner. All bearings should be check before each ride, regardless of the wheel type. It's one thing I see lacking with a lot of these builders, no maintaining.
They ride till it dies, then blame china. I guess it takes a real man to admit when he screwed up, the rest are just boys lying to themselves.
edit: You also have to remember, coaster brakes were never meant to be smashed hard.
edit 2: An now I think about it, I'm the only person i know that checks my motorcycle before each ride. An also I change bearings etc, before they wear out and destroy the races and rim. I also don't wait till my belt is about to break before dropping the $500 to get a new one. I just buy it and change it. An all my friends have had breakdowns etc, while my 40 year old beast just keeps going.