Comment by leeter

> Surely Microsoft has internal tools for Windows that do the same thing: run a battery of tests across popular apps and make sure changes in the OS don't break any user apps.

And hardware, they actually deploy to hardware they buy locally from retailers to verify things still work too last I checked. Because there is always that "one popular laptop" that has stupid quirks. I know they try to focus on a spectrum of commonly used models based on the telemetry too.