There's a long history of this, with Microsoft being a fairly recent, famous example.
> that the government believes will make it so the company can't abuse its market position to harm consumers anymore
… and that I don’t believe “Apple must support Android messages” is that.
Since you mention Microsoft, I think it would be equally indefensible if the government had ordered “Microsoft must create a Windows Subsystem for Linux” as a remedy for their market abuse. Or a much closer analogy, “Microsoft must create a Windows Subsystem for Macintosh”.
I would find it much more compelling if the order were something like “Microsoft must maintain stable interfaces for Linux and/or Macintosh vendors to produce a functioning Windows Subsystem”. But it seems pretty absurd to me that the government could just mandate arbitrary labor on arbitrary products on behalf of their competitors.
And in the past they used to allow, apparently their deal with Apple was 15%. Why should Apple earn 15% of all revenue on Music streaming for a service that isn't even their service.
Yeah, we all knew that. You and about 95% of the other complainers in this thread obviously don't know what you're talking about and keep getting exposed as bad faith actors. It's tiresome and only serves the opposite of what you intend. When someone sees claims like yours and then finds the first result on Google proving you're full of shit, they don't believe the next complaint about Apple that could be legit.
Have people tried parenting their children?
To your example (and excuse my lack of sound legalese), they wouldn't say "Apple must implement RCS", they would say "Apple must allow for an cross-compatible solution" or "Apple must document XYZ features keeping competitors from implementing a proper iMessage alternative".
Want to use a custom client to connect to some service? Want to bridge two rival networks? Such things should be our rights.
https://www.eff.org/deeplinks/2019/10/adversarial-interopera...
That'll never happen. It basically opens the door for all kinds of malicious activity that can go unpunished. From Malware to distributing decryption mechanisms for sensitive information. It's pretty important for some of that stuff to be stopped at its root.