Me and Mrs ND renewed our vows in 2018, after 20 years of marriage. Best thing I ever did, apart from our actual wedding itself - and those of you who know my circumstances will understand why I say that.
A great day, a chance to celebrate with family and friends (including new ones who hadn't been there the first time) and we even had a pork pie "cake".
But if it's not for you, then that's also fine.