Not calling you out because I've been guilty of this before, but this is a great reason to vote in every election, local all the way up to presidential!
Not only will your vote have more impact in local elections (due to even worse turnout), but you know you won't be unfairly purged from voter rolls. Probably...
I get texts and emails about the comings and goings of my ballots as it makes its way via usps. I can’t even remember when the last time I had to make sure I was registered. But like you I think it was when I got my plates, or maybe my drivers license. Colorado is far ahead of its time… like they WANT me to vote with minimum effort.