I have advocated, since 2000, to un-register after each federal election and then re-register within the legal window.
Cheaters won’t know how many fake ballots to print up.
Parties won’t beg for money using registrations.
Can you imagine the clerk reporting zero voters 60 days before the elction and then...millions of sign-ups in the last minute?
Chaos.
I think for a lot of people, just a lot of trouble to do that. Plus there are primaries, and midterms. I know I would never register and re-register like that.