Statelessnes is really a prerequisite for proper horizontal scaling (with small exceptions), so best practices for e.g. spring boot web applications will lead t

Statelessnes is really a prerequisite for proper horizontal scaling (with small exceptions), so best practices for e.g. spring boot web applications will lead to a stateless architecture as well. Same goes for event-driven -> amqp, mqtt (and jms for java) plug easily into most modern web-frameworks, you can be as event-driven as you want to (which in my experience is an overhead to plain http / rest which needs to be justified)