Nice thoughts, Gerald Gordinier. I will continue to use my own very simplified pyramid to give an orientation to the importance of joy / usability / usefulness, but I’ll be more careful to add the asterisk aka disclaimer.

I’d like to point you a little further back the ownership chain: it seem the “slice” graphic you posted was produced by Jussi Pasanen‏ (and tweeted here), who credits the idea behind it to Arron Walter, @benhyphenrowe & @tollady. You might want to edit “has a great illustration” to “retweeted a great illustration”.

Also interesting: Druhan’s refutation of the slice in favor of a mini-pyramid.