How aggressively should a tech platform be allowed to compete before it becomes anticompetitive? In a summer overflowing with big issues for tech giants, from hate speech to election interference, competition might rank above them all. It was questions about competition that led the CEOs of Amazon, Apple, Facebook and Google to appear jointly before Congress for the first time last month. And the discussion that followed may have lasting consequences for multiple ongoing state and federal antitrust investigations, as well the new laws that Congress is expected to draft in response.
In recent weeks, the brunt of discussion about competition has centered around Apple. The company found itself in a new controversy over its App Store rules…