I think the default browser thing is not an abuse of monopoly power. But why must Google have apps? Why must it own YouTube!? Google drive? Gmail? Docs? Self-Driving cars? To the extent these enterprises feed each other, they exploit Google's monopoly on search. It's the exploitation, not the massive market share itself that it is the problem, so divestment and dis-integration seem to me the right way to go.

Amazon should be next. Too many fingers in too many pies.