Yes, the original definition of monopoly that created the Sherman act was all about control of the supply chain. In the late 1800s, the railroads pretty much controlled everything from the coal mine to the hotels at every station. Completed control of the supply chain, this is what Google, Facebook and Amazon are doing right now on the internet. A monopoly isn't about consumer it's about market control. We need to move off the "harm to the consumer" metric as it is in this case too slow to identify the problem.
Errmm, why people say that monopolies don't harm the consumer? They always did, every time. How adblocking restriction in Chrome doesn't harm the consumer? And it's only the most recent example, history is littered with them.
