[AnthonyMouse]

> If the court allows the definition of 'trust' to include "a company gatekeeping developer access to their own operating system" when that operating system represents a much smaller share of the market than the next biggest competitor.

You're talking about two different markets, the devices themselves and the app distribution.

Suppose there are many truck manufacturers and none has majority share, but only one makes diesel trucks. Then that company gets into the market for diesel fuel and makes it so that customers can't use any other provider's fuel in their trucks. They've just leveraged their diesel truck monopoly into a diesel fuel monopoly.

Your argument is that they don't have a truck monopoly, because other people make lots of gasoline powered trucks and electric trucks etc., and truck buyers could reasonably choose them instead. Many of them do. But those aren't relevant when we're talking about the market for diesel fuel. You can't use gasoline in a diesel truck. You can't use an Android app on iOS or install iOS apps on an iPhone with Google Play.