Laws like you propose tend to age poorly. RCS is incredibly consumer-hostile (e.g., there is no end to end encryption unless you use Google’s data-harvesting s

Laws like you propose tend to age poorly. RCS is incredibly consumer-hostile (e.g., there is no end to end encryption unless you use Google’s data-harvesting stack on both sides). Similarly, requiring side loading could preclude new classes of devices. Usually, the laws are written more vaguely for this reason. I think the big change we need to make is to say that anti-trust laws apply whenever N or fewer organizations control over X% of the market. I think N=3 and 75% would be good starting points. Among other things, this would open up licensing and cell plans on 5G modems. It would also mean that the google app store and apple app store both have monopolies over cell phone software resale and distribution. (Google’s “android is open source and supports side loading” argument wouldn’t matter in such a regime, unless that meant that consumers and device manufacturers could reasonably expect degoogled android to actually run android apps and stuff, and that over a quarter of the market actually did so).