And without adequate CS and even subs like whoever does the hotel accoms etc. Big storms in hubs are a valid excuse to cancel flights and do some RR's (although IMO all RR's should be premium pay but I digress) but its not an excuse to have so few CS resources that on duty pilots are sleeping in crew rooms in markets where there's no way you're getting a hotel on your own when that happens. There is never an excuse for that even if they didn't light 14B on fire. All airlines are drawn to that model though because its simply irresistible. Most days it saves money.

Running lean is different than running redline and there has to be the infrastructure to support the inevitable reality of what happens when you run redline and the inevitable IROPS etc happens.