Would be really great if there was a built in event bus with something like sockJs that camunda engine could connect with. Lots of small features and add-ons for the web apps, are always around a back and forth for data transfer, but there is always a large overhead to setup the infra on the web apps (and given the web apps require lots of java knowledge to modify, compared to a raw Angular app), having the event bus infra in place would be great, so people can build the actual add-ons and not worry about the infra!