Clemens Vasters is Lead Architect in Microsoft’s Azure Messaging team that builds and operates a fleet of hyper-scale messaging services, including Event Grid, Service Bus, and Event Hubs. Clemens represents Microsoft in messaging standardisation in OASIS (AMQP) and CNCF (CloudEvents), and has been co-architect of the PubSub extensions for the industrial OPC-UA standard. He looks back at nearly 30 years in professional software development and has seen the same fashion come and go a few times.