I never, ever, abuse my rifles by shooting them so hot you cannot touch the barrel, be it wood, aluminum, plastic, or carbon fiber. If you feel the need to destroy your barrels by shooting so fast you over heat your handguard, then wood is probably not for you.
My woody 5.56 is thinned so it fits over a Rock River free float tube but that means it’s pretty thin in the forend’s finger grip flutes in the handguard.