People are advocating for the opposite. Make apple stop using their anti-competitive market to harm alternative messaging apps.

> If iMessage was cross platform, it’s just another messaging app.

No, it is just as good, and better if it is forced to be cross platform.

You lose nothing, and everyone else gains, when anti-competitive markets are made to support alternatives.

> If you want secure cross platform messaging

Or, instead of that, we could use anti-trust law, against Apple to force them to be less anti-competitive, and allow other people to integrate with it. Problem solved.