For me, it somehow happens all the time. Helping out co-workers, friends or family. Using a different workstation than usual (we no longer have assigned desks).

For me, it somehow happens all the time. Helping out co-workers, friends or family. Using a different workstation than usual (we no longer have assigned desks). Sure, you can mentally "switch" layouts, but it's a pain. Then there's the reverse: My PC at home - wife wants to check something quickly without turning on her PC. Finally: I regularly use both a PC and a laptop. Depending on how weird you want the layout to get, there may not be a way to use it on the laptop. Schlepping an external keyboard around - nope, not practical.