I’m no longer with Airbnb / the project, but we did in fact use SQS Standard exclusively for job queueing (I don’t think we ever did explicitly add any support

I’m no longer with Airbnb / the project, but we did in fact use SQS Standard exclusively for job queueing (I don’t think we ever did explicitly add any support for FIFO). Our SLA was at-least-once (as most job queues are), so this didn’t matter as much. In practice it also doesn’t happen that often.