"My workplace is fewer than two miles from home, so it takes a taxi fewer than ten minutes to get me there and the driver charges fewer than four pounds." Would anyone say that? I suspect not, yet miles, minutes and pounds are all countable nouns.
OK, the above example is just a little mischievous, because all three quantities concerned are considered as elements in a sequence rather than a collection of individual items. The concept of a journey of two miles is not thought of in quite the same way as a bag with two apples in it.
Nevertheless, there simply are situations which demand the demotic/idiomatic ‘less' rather than the - supposedly correct - ‘fewer'. The latter became ‘correct' only in the 18th century in any case. Prior to that, many writers used ‘less' where purists (or pedants) now demand ‘fewer'.
As time passes, we'll see much more of ‘less' and much less of ‘fewer', you may count on it! As an old-timer, I still differentiate between them, but I don't complain about people who choose not to... or don't know that they ‘should'. Even English examiners have been known to produce the instruction: "Write a précis of this passage in 50 words or less", never mind the supermarkets with their till-signs saying: "Ten items or less"!
It must be remembered, however, that there is a considerable difference - in terms of meaning - between a teacher telling his class: a) "Write fewer funny compositions" as opposed to: b) "Write less funny compositions." The sentence at ‘a' would mean they'd been writing too many of these and should try to cut the quantity down and ‘b' would mean the pupils were welcome to go on writing them, but the compositions should not be quite as amusing!