It has probably all been said already but it seems to me to be simply a "horses for courses" situation. In an area of photography where a fully automated 35mm SLR offers no advantage in taking the shot compared to a 6x9 such as is often the case in landscape or other scenarios where speed in the loosest sense is unimportant then I'd be amazed if any 35mm neg can compare to a 6x9 even if it is 50 or more years old

Just don't try to take a shot at the Isle of Man TT motorcycle races with the 6x9 and expect it to "deliver" as an F5 with a zoom f2.8 would do, unless it is "in the pits" shot with static subjects.