I accidentally shot a broad-daylight picture at 1/30th, F/2. That would be 9 stops overexposed. I'd be lying if I said the picture was fine, but after a bit of darkroom effort, it was passable.
I don't find anything magic about modern Tri-X. It's a good film and economical in the form of Arista, but TMY is basically a better Tri-X.