When you have small children, you put your sharp knives out of the way. If children get a bit older, you first teach em responsible use of a knife, then give a sharp pocket knife. And some kids not even that.

Point being: In Ruby, sharp knives are too accessible, come with no warning or even encouragement.

Yet contrary to actual sharp knives (or guns pointed at feet) the feedback loop is slow. When you shoot yourself in the foot, or cut your finger, you feel it right away and (hopefully) adjust before more accidents happen. With Ruby, a footgun is fired today. Or a sharp knife carelessly tossed in the bag yesterday. But you'll feel the pain in months or years only. And probably not even you, but the person who followed your follow up.

Sharp knives are cool. But they need education on their dangers and responsibilities.