I've found wiibrew.org and hackmii.com in there which are both Wii homebrew sites that became popular around 2008/2009 and probably declined in popularity starting in ~2012/2013.
Then there's also wiiu-developers.nintendo.com and wiiudaily.com which probably didn't exist before late 2012 or early 2013 when the WiiU was released.
I've found wiibrew.org and hackmii.com in there which are both Wii homebrew sites that became popular around 2008/2009 and probably declined in popularity starting in ~2012/2013.
Then there's also wiiu-developers.nintendo.com and wiiudaily.com which probably didn't exist before late 2012 or early 2013 when the WiiU was released.