I have moved away from the poncho/tarp except sometimes hammocking. The reason is the availability of cheap, effective waterproof/breathable raingear weighing less than 13 ounces - either FroggToggs or DriDucks. You need wind protection as well as rain protection in 3 seasons and the w/b raingear replaces wind shirt and pants. Then a dedicated tarp makes more sense. On the other hand, a poncho tarp is OK for summer, IMHO, when the possibility of hypothermia is low or nill. IOW, I consider it to be a safety issue.