Type F fluid in 727

I've run type F before and known a lot of people who have run it....and with no bad results. That said, here is my take on it now. THe only reason I've ever heard to run type F where it is not recommended is to firm up shifting. My opinion is that firming up shifts should not be something fluid is relied on to do. that's the job of the internals of the valve body and associated parts. It's their job to tell the transmission how hard to shift, not the fluid. When you realize that, the question becomes more of why run type F....not why not run it.