I'd say the degree of testing depends on the domain. Facebook in its early days could probably afford to drop a some data on the floor. Boeing and its subcont

I'd say the degree of testing depends on the domain. Facebook in its early days could probably afford to drop a some data on the floor. Boeing and its subcontractors can't simply can't screw up flight software (or this happens: https://en.wikipedia.org/wiki/2015_Seville_A400M_crash https://en.wikipedia.org/wiki/2015_Seville_A400M_crash). In-between, we're seeing a lot of Bitcoin and other sorts of handling money associated firms discover that "move fast and break things" can result rather quickly in a broken firm.