Earlier quoted context omitted.
We know. I think the main objection is that it is just more noise and clickbait that really teaches nothing[0], or this case, buybait. [0] I think it actually unteaches things as it obfuscates the point of the shape of the periodic table.
Definitely buybait and a shame that a blatant advertisement has made to YC news front page. What's next? Novelty toothpaste for nerds?
One that changes color the longer you brush so that you know you've brushed sufficiently (and not just blood-red to indicate your gums are now bleeding).
One that changes color based on where the calculus on your teeth accumulated, so you can target you brushing.
One that does the brushing for you, just keep it in your mouth for 3 minutes and rinse.
Oh lord...