Things that thrived for decades can be ruined in minutes. There is no equivalent in the other direction. There’s a good reason why. Growth always fights against competition that slows its rise. New ideas fight for attention, business models fight incumbents, skyscrapers fight gravity. There’s always a headwind. But everyone gets out of the way of decline. Some might try to step in and slow the fall, but it doesn’t attract masses of outsiders who rush in to push back in the other direction the way progress does.