Boasberg posits a hypothetical: would it matter if only 10 percent of users’ time on Meta’s apps were spent on friend and family sharing — the use case the FTC says Meta monopolizes? This seems to be a key lingering question for the judge. “Does it have to encompass their core use? So, the majority of what users go to the platform for?” he adds. Hemphill acknowledges the slippery slope, but says that even at a hypothetical 10 percent of its business, that would still be “large and important and subject to monopolization, and it would still be something that we care about.”