Just Dance has had yearly releases since 2009, and the Wii has always been included. The marginal cost of continuing to support Wii is negligible, since their

Just Dance has had yearly releases since 2009, and the Wii has always been included. The marginal cost of continuing to support Wii is negligible, since their engine has always supported it and needs minimal upgrades-- it just needs to play background video and perform platform-appropriate motion tracking and interpretation. I guess middleware support might be an issue, and Just Dance historically used Scaleform, which appears to be entirely discontinued at this point, but presumably they have a perpetual license for it.