Even so, the example is a tad puffed up:

    if (count > 100) {
      $el.removeClass('low-value');
      $el.addClass('high-value');
    } else if (count < 50) {
      $el.removeClass('high-value');
      $el.addClass('low-value');
    } else {
      $el.removeClass('high-value');
      $el.removeClass('low-value');
    }

Compare to how this would normally be written:

    $el.toggleClass('high-value', count > 100);
    $el.toggleClass('low-value', count < 50);