So, Citi's got some seriously flexible rules when it comes to switching between their credit cards, and that's awesome news for us travel hackers! Basically, if you're not loving your current Citi card (maybe the annual fee is too steep, or you're not using the benefits), you've got options. You can potentially downgrade to a card with no annual fee, upgrade to snag better rewards, or even switch between completely different Citi card families, like moving from a cash-back card to a travel rewards card. Why does this matter? Well, it means you're not stuck with a card that isn't working for you. Instead of closing an account and hurting your credit score, you can simply morph it into something more useful. This is especially handy if you're trying to avoid an annual fee or want to maximize your rewards based on your current spending habits. Just remember to do your research before you make any changes to make sure your new card matches your needs!