What Happened to Destructible Terrain?

I bet most of you will have had the pleasure of playing the new Battlefield 3 or, if failing that, will have at least seem some videos of the destructible terrain that the franchise utilizes in it's gameplay, so you'll know just how enjoyable it is to blow through a building with a tank and or bring a building down to eliminate that pesky sniper that's been picking you off for most of the game. But I have seriously got to ask, what has happened to destructible environments in games?