I picked up this product design tidbit from Dustin Curtis a few weeks back:
“Things that are easy to use survive, regardless of what is fashionable, and people want to use them forever. But if things are created merely for a passing vogue and not for a purpose, people soon get bored with them and throw them away. The fundamental problem is that many products are created to be sold, not used.” – Yanagi
Sori Yanagi hails from a family that made samurai swords, and that’s no surprise when you take a look at the flatware he designed himself.
In my opinion, the test of time is the ultimate test for your product. Products will survive a “passing vogue” if they are purely designed to be used. I strive to keep this in mind every time I go to the drawing board.