Every time there's a discussion about tech antitrust (google, fb, amazon, ms) people point to each of these as being their competitors, therefore, there is no monopoly or antitrust issue.

Perhaps we need to rethink antitrust in the context of the internet however. These laws were written in the late 1800, and early 1900s, long before Google existed. I think there should be some evaluation on needing a new framework of what is antitrust for tech companies.