Coldplay had the chance in its hands.
The band (don't know lyricist, too lazy to look it up, so am referring to entire band in the singular instead of the one responsible for actual lyric) could have shoved the pendulum back toward the "Remember Subjunctive? This is What It Sounds Like" camp. Coldplay probably would not have undone Gwen Stefani's Pepsi-Super Bowl-everywhere assault "If I was a rich girl" but it could have added to the corpus of folks using SUB-TEN correctly.
But, no. Their latest album, X&Y, includes the track What If, with such lyrics as:
What if there was no light
Nothing wrong, nothing right
What if there was no time
And no reason, or rhyme
Dang it! But, then, in the next two lines, they decide to get in the mood:
What if you should decide
That you don't want me there by your side
Is something better than nothing? Or is it too little, too late?