Calamity mod follows up base Terraria so well that it's hard to believe. I really appreciate that the art and items stick pretty close to vanilla theming for the most part. The bosses are challenging, fun, and lean more into the bullet hell tendencies of the game. Items are designed really well, it's hard to find too many that are outright disappointing or feel bad to use. It's also a really stable experience, even in multiplayer. The only bug me and my partner experienced was during one of the last boss fights. To my knowledge this is relatively new content, so it's forgivable. Terraria's model of progression is so satisfying I wish it could go on forever. I'm very much looking forward to what future updates have in store.