A quote from the last link: "The basic rule for precise use of 'less' and 'fewer' is simple (though we slip often). Use 'fewer' with countable, individual things, and 'less' with uncountable amounts, volumes, etc. So: 'I should drink less coffee,' but 'I should eat fewer doughnuts.'"
> 'Smaller keystrokes' is, in context, nonsensical.