Voter re-registration in Florida?

Today, the USPS letter-carrier delivered a letter from the Duval County Supervisor of Elections, telling me that because my signature on record with the State of Florida is over 10-years-old, I'd need to complete an (enclosed) update form. Otherwise,

The form and letter look legitimate, but I wonder if others have received similar snail-mail. I think I'll hand-deliver it to the Supervisor of Elections office next week, once they re-assure me that this is not a scam.

I'll reserve judgment on whether or not there is an ulterior motive behind this. Could this be a move dis-enfranchising voters who prefer mail ballots? Could we garner enough votes to unseat Gaetz, Rubio, Scott, and my so-called Representative John "Barney Fife" Rutherford?