Lots of things are built on FOSS components. How many appliances are built on nix-with-an-app? Are they just wrappers? What about Linux distros themselves, or a

Lots of things are built on FOSS components. How many appliances are built on nix-with-an-app? Are they just wrappers? What about Linux distros themselves, or all nix flavors and distros? The value, in this case, is in the UI. The engine is a commodity.