Trouble with the lo-cos is that cabin baggage is now completely maxed out due to check in costs. Overhead bins used to be for coats, briefcases & an overnight bag- now on a shorthaul aircraft they are probably stuffed with about 2,000kgs of luggage. On my last recent lo co flights 8 cabin bags had to be tagged into the hold as the bins were chokka. Unfortunately, in an evacuation, there will also be some pax trying to drag their bags off.The more bags in the cabin- the more likely they will impede a swift exit.
Any safe evac without injury is a success.