This article was a response to the "Best UI no UI" debate that was sparked by one of Cooper's article I think [1]

Personally I think the "Best Interface = No Interface" mantra is too black and white and totally ignores all the shades of grey in between. If you come up with these principles, the language needs to be much clearer.

I think what people meant to say was "Sometimes the best UI is no GUI".

Best response so far is by Scott Berkun[2]

[1] http://www.cooper.com/journal/2012/08/the-best-interface-is-...

[2] http://scottberkun.com/2013/the-no-ui-debate-is-rubbish/