My 2 cents - There is no anti-pattern specific to event driven. It is essentially asynchronous nature. It means you start with understanding the business needs

My 2 cents - There is no anti-pattern specific to event driven. It is essentially asynchronous nature. It means you start with understanding the business needs and SLA. Question often comes in my experience is "can they wait?" and what's the risk of dirty data or data fetched with delay ( worst case ). event driven is always about worst case scenario and will it work then.