> As for the other thing about neither the FTC nor the EU actually bringing any proceedings against Amazon or iRobot and simply requesting information: this seems either naïve or a misrepresentation of how governments act to end deals. It's not that convincing to me that organizations that have expressly indicated that they want to break up the big companies are "just asking for information".

The ask for information on pretty much every big acquisition. How else do you expect them to decide if they should try to stop it or not?