In May 2020, David Maxwell sat down for an in-depth interview with The Currency. Of course, Maxwell was sitting in one room, and I was in another. Covid had shuttered the economy, and the world was coming to terms with social distancing.  As the chief executive of Boojum, the Mexican restaurant chain, Maxwell was at the coalface of the pandemic. His outlets continued to trade, but it required fast-paced change and no little resolve. Maxwell was confident that his chain would emerge from the pandemic. But he was worried others would not, and the interview centred on the Save Our…