For competition to strengthen a space, it needs to be meaningful competition. The goal for regulators should not be "more than one player in every category." It should be diverse product expression, improved customer utility, and most of all ZERO winner-take-all effects.

That last item (winner-take-all) is crucial to understand, and I'm sad that it is no longer a major part of economic discourse (as it once was when systems-thinking was more common). Winner-take-all effects often occur without an explicit monopoly, yet devastate the category and its adjacent categories.