Things go wrong. Spare A/C don't sit around idle at XXX $ Million a pop. Get over it. Be thankful that people are professional enough to stop ****b#xes taking off on time. Unlike some other countries.
Certainly be thankful for that but maybe realise airlines are going to get less reliable as things become tighter. What little slack they had in the system is being weeded out. Could always jump in the Cruiser and drive accross if you think its that bad!