Does everyone remember when the Government declared that AT&T was "Too Big" and needed to be broken up where all the "baby bells" were sold off where Bell South and all the other Bells were sold off? Today AT&T is much larger (I believe) than it ever was and worth far more in value with far more influence and power. Today AT&T has it's hand in so many pots that hard to name them all from entertainment, U-Verse and Satellite TV, as well as Cellular Phone (Wireless) and as well as phone service mostly through Voice over IP rather than hard wire cables. AT&T, I submit, may not be a monopoly but is far more powerful and influential than at any time in history. Whereas before they were mostly or only involved in landline phone service today they are in direct competition with cellular phone service with Sprint, T-Mobile, and Verizon and with Cable and Satellite Entertainment providers such as DISH Network and Comcast/Charter Cable.
I'm not saying that the judge should have prevented AT&T from assuming Time Warner but it's interesting that the power they have has grown rather than being controlled by the government. Today there are other potential Monopolies that are beyond government control and are entities of their own so powerful and disruptive of other like industries. Google and Amazon.com to name just two.