Instead of breaking them up or enforcing arbitrary separations (say between OS and apps), regulators could force them to provide APIs for competitors to use. F

Instead of breaking them up or enforcing arbitrary separations (say between OS and apps), regulators could force them to provide APIs for competitors to use. For instance, Google has ~90% market share in Europe and many websites restrict access to Googlebot, which makes it impossible to compete with them on a level playing field. Regulators could require them to offer a search API for a reasonable price, similar to the FRAND obligations put on essential patents.