I've had my Wii U freeze on me a couple of times like many people here in this forum. I did the unplug and everything looks good as new after the reset, but I worry that it damaged the hardware someway for it to freeze like this and for me to do this power unplug. (Mind you I didn't unplug it during that "Day-1" Major Firmware Update - which came out fine for me.)
Am I worrying too much? 