Quote Originally Posted by Iscah View Post
Future expansions don't have any mandatory side content like this, but if you enjoy the story then it's recommended to do the major side content as you go through each expansion rather than putting it off. Some of them get significant callbacks later, so while they're not critical to understanding what's going on they can still add some extra context.
I'll also add that the ARR raids, Coils, have story relevance that is more closely linked to the MSQ than later raids. They are difficult content but they can be unsynced if you just want a story clear. Also great for tomes and gear.