"Less" is used for countable things too. Some time ago some people tried to make up a rule that it shouldn't be, but "less" has been used for countable things

"Less" is used for countable things too. Some time ago some people tried to make up a rule that it shouldn't be, but "less" has been used for countable things for over 1000 years. See some linguists' takes: http://itre.cis.upenn.edu/~myl/languagelog/archives/003775.html http://itre.cis.upenn.edu/~myl/languagelog/archives/003775.h..., https://languagelog.ldc.upenn.edu/nll/?p=2819 https://languagelog.ldc.upenn.edu/nll/?p=2819