I can understand saying "dualboot doesn't count" - because if you are using Windows occasionally, even just for games, then it shows it isn't possible for you to use Linux exclusively.

Anyways, I don't think anyone denies games/Linux are a problematic combination. I'm not a gamer, so I'm happily Linux-exclusive, but if I were a gamer, I doubt I could live without Windows, even if I only used it for gaming.