Fotos in Blick newspaper show pax with carry on as well as a flight attendant with carry on. 1R slide not deployed, probably expecting a moving stairwell. Rear left not deployed, there a moving stairwell was provided.

My key question is if the carry on luggage was retrieved after the evacuation. Probably not ...

The time that passed to assess the threat might have removed a sense of urgency, but for me this is a black or white situation. Either it is not urgent to exit, you get stairs, take your luggage. Or it is an evacuation as it was done here. Fire or not, pilot decided its urgent. Take your phone and passport (if you have time to grab before evacuation starts) but then its "out out out" as fast as possible. Nobody can know the reason for the evacuation. If its urgent, its urgent. Every bag selfishly endangers the people behind you. I cannot understand this behavior. Its not helpful to see an FA with bags after an emergency evacuation.