So where would a queue go in a distributed system if not in some kind of database/file system? How do you handle resilience if the queue is not stored on disk somewhere? Paxos?
Well the point is more that a lot of stuff doesn't even need to be in a queue. It's just cookie cutter engineering. "I did this before and it worked so I'll do it again" without any consideration on what it does and why it does it.