I doubt you can feel ANY difference with just lines, when you're braking with your foot aided by a booster (vacuum assisted). I can BARELY feel the difference on a motorcycle, which has no booster and we're braking with our fingers. Of course the only exception is BMW bikes with servo brakes (like my K1200), where I wouldn't bother either.
But the other aspects, like degeneration over time, etc., are valid points. I'd only replace them if I tracked my car, but more for safety than feel. Good day.