A very important point. Antitrust has entirely different conditions to be met. The EU conditions are even more complicated than < 4 competitors and are evaluate

A very important point. Antitrust has entirely different conditions to be met. The EU conditions are even more complicated than < 4 competitors and are evaluated in-depth in each case. At the same time, antitrust law has been attempted as a mechanism for ensuring freedom of information, although largely unsuccessfully (due to internal growth; EU antitrust law is predominantly geared towards blocking acquisitions afaik). Now, media regulation is an entirely different regulatory approach: It has more normative roots, and in some cases is even precautionary: Allowing sanctioning in the face of plausible threats. That's a very sharp sword and the reason why platforms fear it. [edit] For completeness, the definition of "big enough" in the EU is called dominant position and is defined in the Hoffman-La Roche case. It means being so powerful that competitors can no longer act independently. (https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:61976CJ0085 https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:61...)