Party-switchers, ticket-splitters, and the decisive volatility waiting to be harnessed
Just to reinforce - party switching went the other way too. In Florida, "Democrats" voted heavily for Rs. Just look at Hialeah where DeSantis got 80% of the vote.
To be slightly pedantic, there are three concepts here that are important to disentangle. Persuasion is the easy one. It is always good to take votes from their team and move to your team. Where things get slightly complicated is noting the difference between turnout and mobilization. What Democrats need to do is mobilize their team instead of just maximizing turnout--the total number of people who vote (unless you think people you know nothing about will break toward your side, which is a dubious assumption).