Or, on the flip side, how much do you lose by deploying an 'oops', resulting in customers having a bad experience and posting "This thing sux!" on social media?

Or, on the flip side, how much do you lose by deploying an 'oops', resulting in customers having a bad experience and posting "This thing sux!" on social media? I can sympathize with the costs in both time and money to maintain a staging environment, but you're going to pay for those bugs somehow - either in staging or in customer satisfaction.