There’s essential decoupling and accidental decoupling; decoupling you want, and decoupling which mostly just obscures your business logic. - The Big Little Guide to Message Queues

see also

• durable message queueing
  • A durable queue is literally a queue that doesn’t drop messages e.g. during an unexpected shutdown. That’s all.
  • a durable queue makes it vastly simpler to build a durable workflow engine. - HN
• Camunda External Tasks