For me I'd say it's a nicety that I'd add after more essential items. Mainly for looks probably!
Half of the pipes are not in view for looks, the high temp elbow has silver heat shielding round it and IC pipes are under the engine!
As said i have done my piping for reliability and durability, when running higher boost and putting components under more strain i dont want to go looking leaks and failures at all if possible.
But agreeing on the fact that it adds some colour to the bay, jazz it up you might say