The Comcast "monopoly" is in the process of falling apart, on one side from Netflix, Amazon, and Hulu and on the other side from Google fiber, 5G wireless, mesh networking, and perhaps even the Elon musk LEO satellite Internet plan.
Ma Bell was a monopoly long before the government tried to reign it in.
The Willis Graham Act nullified the Kingsbury Commitment by which the government had tried to stop the unfettered expansion of Ma Bell, since it hadn't actually worked the government shifted to trying to regulate Ma Bell itself through the ICC (and the FCC a few years later).
And what happens to that threat when Comcast "accidentally" blocks them for an extended period of time?
"and on the other side from Google fiber, 5G wireless, mesh networking, and perhaps even the Elon musk LEO satellite Internet plan."
Which are taking their sweet ass time to find their way to consumers.
...because of government red tape.