That depends on whether your queue system and the rest of your data/processing system fully respects data ordering requirements. A webshop sales process is quit

That depends on whether your queue system and the rest of your data/processing system fully respects data ordering requirements. A webshop sales process is quite simple to order, but if you have multiple events driven by the same queue, you also need a way to synchronize the results of those processes with the main queue. So, as always, it depends.