Wii has been having some problems selling since, well a long time. And to boost sales nintendo has started selling a non Gamecube compatible Wii (wii refresh). Now you might think this lite version would be cheaper, but thats not quite the case. It will be selling for the same price as a regular, gamecube compatible wii, difference being its made to look better on the side, and to, not play gamecube games. I dont know about you, but i’d go for a regular wii.
Most likely Nintendo felt it was okay because Sony did it.. (in 2008 Sony removed PS2 support from their playstation 3)