My understanding is that it implies most Deck owners aren't using them for anything other than purely gaming, then switching back to Windows for everything else. I kind of agree with that point, sure there are more Linux machines out there, but people are still using Windows over them, if the Deck was a standard PC and people were ditching their Windows machines for it that'd a different story. That said, it still means more people using Linux at the end of the day even if just occasionally and in a very restricted way, make of that what you will.