So when you say “pedal feel” you’re saying water can be compressed but brake fluid can’t? Or that the water and fluid will combine to make it feel bad? Or water is heavier and will go to the lowest line and rust it through (if it sets for a long period of time)? Or maybe if the fluid still moves around it won’t rust but the discoloring gives you the impression its no good? Kinda like rotating my cans of soup in the pantry to keep them fresh. Like I said, never in the 55 years of messing with cars have I ever changed fluid and my brakes have always worked very fine. Like washing lug nuts, useless
40+ cars through the years