Imagine using a Testclient and Server

Hmm we will bring a Patch. ✓
Lets not use or create some Testservers and Clients for us to try the Patches we are working on.✓
Testers would cost some Money. ✓
And holding on a scheduel hmm nah. ✓
Players can wait. ✓

I dont see anthing not checked here.
image

One of the AWS interview question goes like this:

How would you ensure a 0-downtime deployment of a new app version (DevOps)?

Oh, the irony.