The dilemma of "contemporary" fiction and one possible solution

I write stories about teens facing real-world problems in a today-ish setting. I say today-ish, because the biggest dilemma of writing a contemporary story is this:

The world doesn't stand still while you write. Major changes happen every day, to cultures, to landmarks, to technology.

Those unanticipated changes can make your story absolutely laughable.

I'll give an example from one of my books. I started writing it after a trip to the UK in 2006, and had spent the weeks doing heavy on-the-groun...