Big changes are risky. The core of making continuous deployment work safely is ensuring changes are small. If you have CD after a huge PR lands you are in risky

Big changes are risky. The core of making continuous deployment work safely is ensuring changes are small. If you have CD after a huge PR lands you are in risky territory, the chance you need to unwind is higher, but the size of the PR means it's more likely to have entanglements. It's lower risk to make small changes under feature flags. The final step of deployment can then be turning on the feature, and turning off is trivial. If something breaks along the way, undoing the commit is easy because it'll be small. Small changes frequently applied are the path to low risk continuous deployment.