I don't recall multiple month suspension of broad categories of business in the last 20 years. But yes, probably even more frequently than every 10 years - it'

I don't recall multiple month suspension of broad categories of business in the last 20 years. But yes, probably even more frequently than every 10 years - it's too easy to cut corners, so someone will, and the businesses behaving "correctly" need to compete against that. That's if we want companies to be prepared for this.