I don't think I've heard anyone use the word redundant to describe anything that was more complicated than an exact 1-1 replacement. The two-punch combo is a good analogy; I wouldn't call a punch that knocked someone out cold redundant if it came after a punch that simply gave them a nosebleed.
probably OP means to say given that you got the knockout punch the first punch is redundant not the other way around. Since no aircraft is selling now, 737-MAX issues are no longer relevant is his premise
And Airbus has to deal with the same thing now, whereas before Boeing had a unique disadvantage.