Keep in mind that there can be several reasons to foil ribs.
You are cooking in an offset that flows a large volume of air and cooks very dry,and you may be using a large water pan as a humidifier.
The CS is a moist cooker,and many open the door some to let moisture out.
You are using a pure logburner and you don't wish to oversmoke.
You are running an inefficient fire and don't want to lay on soot.
Neither should be a problem with a CS.
You are wanting to speed up the cook,so you want to crank the heat and braise the slabs-like a covered pan on the home stove.
You are having trouble with fire control,which the CS doesn't.
You have a thinwalled,leaky cooker and it is windy and raining.
You are cooking for the nursing home, where lots of folks may have store bought chompers,and they like to eat mush.
Yep,that's several reasons Smokin' loves foil.
There are some distinct specific uses,but not all purpose.