Hurts them in the short term, but no one will remember or care in the long term.
Probably the right answer. The GOP will also attempt to pass a bunch of "voter integrity" stuff that the left will deem voter suppression but will alleviate some of their fears. This may especially be the case if Republicans gain governorships in Michigan, Wisconsin, and Pennsylvania. I don't think mail-in ballots though are going away, even if there's less than in 2020, they'll still be a large part of the vote (and already were in many western states).