The largest chains would suffer the most. They don't train their staff on how to handle outages, and most are centrally managed, soviet esque command companies,

The largest chains would suffer the most. They don't train their staff on how to handle outages, and most are centrally managed, soviet esque command companies, with local store managers & staff not having the skills to price or order inventory. Some chains don't let anyone at the store level do pricing or promotions at all.