and what?? are we that tied to tradition?
it's really not a bad idea at all to keep it relatively frequent. a lot can happen in the space of 2-3 years. a very active poster can become someone who logs in once a month and barely contributes. in fact that does happen with mods. better to keep it regular.
again - even if the mod personnel doesn't change, or nobody volunteers, just giving users the opportunity once a year and having an election if required feels like a good way of keeping everything fresh and making sure the current team comprises active posters. I feel like you're reacting as though something seismic is being suggested rather than a simple annual check-in.