The ability to create new connectors for all kinds of different systems, so we don't have trouble integrating with most things that are out there in our industry space (financial services). It's not as easy or straightforward an interface than some other products I've used before but it is definitely powerful once you get your head around how everything works together - especially when using Apache Kafka! We're building up integrations into many applications at this point which has been really useful too since they can be developed independently from eachother without having any cross-talk between them if needed later downthe line.