Live data from Hacker News

First Ultrasonic Chef's Knife Vibrates 40,000X/Second for Easy Cutting

cnet.com

21–22 of 22 posts

Re: First Ultrasonic Chef's Knife Vibrates 40,000X/Second for Easy Cutting

#22
post #14

It's a good idea, but it's probably cheaper and, from an ecological standpoint better (than e-waste) to sharpen knives; a top-quality professional electric knife sharpener will set you back $170 and last you a lifetime; which is a third of the cost of the Ultrasonic's knife. Cool idea though.

I don't get it. How is buying a "top-quality professional electric knife sharpener" more ecological than buying a knife with a bit of electronics in the handle? Both are used by one person in your proposal and I would think, that it needs more energy to build the sharpener.
Post reply on HN