https://theconversation.com/election-security-means-much-more-than-just-new-voting-machines-94242

Despite relief that votes themselves were not changed, these registration systems dictate who is allowed to vote and where, and how voting materials (like referendum information and absentee ballots) are distributed. Elections are often determined by small margins. Selectively disenfranchising a small percentage of voters could very well swing the results.