I think large systems would benefit from "playgrounds" as well. Staging servers are a thought in that direction, but they're a very serious matter designed to r

I think large systems would benefit from "playgrounds" as well. Staging servers are a thought in that direction, but they're a very serious matter designed to root out failures before they destroy a production system. I think it might be useful to have a playing server/system as well, similar to the staging server which houses the version currently in production with mock data, intended for rapid testing and iteration or playing through failure scenarios. Let's see if we can put feature X into it. Let's see what happens when Y fails catastrophically. Let's do a practice deployment with one of the devs. Let's see how quick can we get it back up if the cleaning lady pulls the plug by accident. That kind of stuff.