The Fbody died due to lack of marketing, and insurance rates. As Eugenics said, early 90's, they were on top of their game. Mid 90's, GM just stopped caring about the Fbody. It still made a following, but it never got the sales it could because GM just stopped caring. Perhaps with sales, suspension could have been changed to the point where it could handle with the likes of track cars. The potential was there, but not the dedication.
And suddenly braking at 70MPH will be difficult in any car. The Camaro is heavy, but they don't match brakes and tires to it that can't stop it safely. Right out in front of, and 70 MPH, do not equal ideal "handling" situations.
I am by no means a fanboy. I would love to have a 300ZX, Supra, MR2, Impreza, etc. Hell, I was looking at Integs for my next car. I just think that the hate the FBody gets s a little harsh at times.