When things are used by millions of people attention to detail takes on a different meaning. It is no longer that fretting the little things shows that one is a good designer.
Fretting the details shows a respect for the user.
If 1,000,000 people use a product and 1% of those people notice a detail and appreciate its inclusion that's 10,000 people.
If 5% of those people appreciate the detail, but can't put their finger on what it is that they like, that is 50,000 people.
Making tens of thousands of people happier with one little detail is new consideration as more and more people use the same products.
Respect the users. They'll appreciate it.