It is somewhat pathetic to believe that spending time on support is wasted dev resources- particularly when a team has not been prepared to crash. The support being done by team members is massive plus; big companies can twist their support layer between the customer and the dev, so the communication becomes thin. Therefore, when your app goes down, the only strategy that is highly effective would be to serve your users without any issues with the assistance of your Technology Support Services and co-devs who would switch to support mode.