I would not consider this examples "Applications", but more configuration tools. I would also not expect to be able to port the OSX Clipboard manager to Windows or the "Displays" utility. From a new window server I would expect to have some ways to configure output, switch applications, manage clip-board but I would not expect to have my existing tools continuing to work.

If you are re-architecting a system from the ground-up there is always some fallout expected.