Idempotence is a very useful property to have in a distributed system. This is because most distributed systems are (by definition) not atomic wrt state transit

Idempotence is a very useful property to have in a distributed system. This is because most distributed systems are (by definition) not atomic wrt state transitions. For example, it is not cheap to guarantee exactly once delivery over an event bus. If you can build in idempotence, your gonna have a much easier time adapting to changing business requirements