That's purely the personal preference of one curmudgeon from 1770. "The OED shows that less has been used of countables since the time of King Alfred the Great -- he used it that way in one of his own translations from Latin -- more than a thousand years ago (in about 888). So essentially less has been used of countables in English for just about as long as there has been a written English language."

http://itre.cis.upenn.edu/~myl/languagelog/archives/003775.h...

While you seem to have started a grammar war complete with grammar Nazis, I appreciate the feedback.

Stop nitpicking this. There's nothing unclear or ambiguous about 'less'. It refers to a smaller quantity of something. There's no reason not to use it. This is just pointless grammar Nazism.

Debating grammar is perhaps one of the best ways to actually learn grammar and otherwise sharpen language skills. I don't think it's a coincidence that grammar and language discourse has been a past time of the learned for millennia around the world.

Not interested in weighing in on less/fewer, but not sure architects of genocide is the comparison we want for grammar sticklers, even if it's become a common turn of phrase. Cheapens the real thing, doesn't it?