Zero downtime deployments is not the same as zero downtime generally ever. We deploy to production several times a day. We have an in-house product that our ow

Zero downtime deployments is not the same as zero downtime generally ever. We deploy to production several times a day. We have an in-house product that our own emplyees use and they absolutely love that they can ask a feature in the morning and get it in a few hours (in best case scenario). That wouldn't be at all feasible if all those deployments caused errors to users. Luckily that's not a problem, because these days it's really easy to get zero downtime deployments with all this containers and "serverless" functions and whatnot.