We had pretty good (but not amazing) unit and integration tests in many of those systems, and a willingness to manually test the systems where we didn't have te

We had pretty good (but not amazing) unit and integration tests in many of those systems, and a willingness to manually test the systems where we didn't have tests. If we had to lean on a QA department to get this stuff done, I'm not convinced we would have been able to actually deliver that project.