The last time the courts seriously weighed the wisdom of breaking up a giant technology company was a quarter-century ago, after Microsoft was found to have illegally stifled competition in personal computer software. A Federal District Court judge said yes to forcing Microsoft to split in two. But an appeals court threw out the order, calling the breakup option “a remedy that is imposed only with great caution, in part because its long-term efficacy is rarely certain.”
Source: Why Antitrust Breakups of Google and Meta Could Be Difficult