I know most of the pax don't have the experience of incident reports that posters here do, but the follow-up of "leave your bags behind" has been regularly subject to adverse comment by those who have followed the regulations, which of course the investigators never report on, it being left to the general media. Instead of returning items as a matter of priority, investigating authorities have this "touch nothing till we all come" attitude which leads to possessions, correctly left behind, being inaccessible for days, for no purpose. Car keys to drive home, car park tickets, passports, credit cards, money, all that. Eventual recovery has the items "lost" (no surprise there, especially the valuable ones), returned way after the event, etc. Sure, you should have these on the person, and normally you would, but as security in departures has likely just made you take all this stuff out of your pockets and put it into your laptop bag, there's generally a good proportion still there.
Two recent major evacuations had major criticisms of all this, including passengers being left with no means to continue their own journey. It's especially bad at outstations with just a handling agent, but happens at main hubs as well. The pax from the BA evacuation at Las Vegas were taken to hotels, on BA's account, but those unable to produce a credit card, left behind in the aircraft, for the slightest incidentals on top they might use were given the bum's rush in no uncertain terms by standard US hotel check-in procedures. And you try and board the replacement aircraft with no passport ...