Thanks Michael.

With "increased complexity" I was pointing to the additional ramp up that is needed in order to get the event driven systems work in a practical production environment.

For eg. An org that currently does not have a messaging system will need to

1- invest in to setting up a Kafka infrastructure.

2- have dedicated Kafka teams to maintain these systems.

3- observability can be challenging which requires elaborate ELK/Grafana setup.

4-Messages being moved within these systems can grow at an exponential rate and these need to be managed meticulously. Failure scenarios also need to catered to well