I suppose the good that can come out of this is the SCOTUS will have to set precedent on individual voting issues as being discriminatory or not. It just takes a long time for that to happen. In the meantime, many will be disenfranchised.
Most (if any) challenges won't get to SCOTUS. DOJ will be forced to bring probably hundreds of Section 3 challenges, how that will shake out remains to be seen.
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