In Florida, if you miss one general election, you have to renew your card. Renewal is easy
I've heard, I've not had to renew mine.
On the other hand, we have to wonder how many people who have addresses in 2 states, have voter registrations in both places. Some people live to cheat any system. Our country, which the media keeps trying to convince us is on the verge of economic despair, has a huge number of boomers with vacation homes in nice places. In fact, I may be the only one of my friends not to have one!