I think the intractable problem is that it does very much make sense to have a unified marketplace for everything, but that it is also very much not ideal for it to be run by either a private for-profit monopoly or the government for different reasons. I think the same is true of a basket full of internet-based services.

For example, I'm completely convinced that if Facebook is declared a Monopoly and taken apart it would only pave the way for a successor to become the new "Facebook Replacement"/"Monopoly." I think the same thing is roughly true for parts of Amazon. And of Google.