What?!? You're a human?!?
Seriously to me the cost difference and the welding hassle (neither of us owned a tig at the time, now we both have them. lol) weren't worth the small weight savings to me as my car is obviously not an all out effort heads up car. Many heads up classes also have minimum weights so I don't know the real advantage except that if you aren't close to the minimum you can put the weight where ever you want. Other than that, I dunno.
Oh and pi(e) in my book is a delicious variously crumbly or flakey crust treat with a sweet creamy or fruit filled center. Most excellent with cream either iced or whipped as an added topping.