As usual, Gruber was right on the money. Via Threads yesterday: "My prediction is that Apple will make changes—fixing bugs and/or closing loopholes—that break Beeper Mini. It’s untenable that there’s unsanctioned client software for a messaging platform for which privacy and security are a primary feature. It’s a very nice app, remarkably clever, and for now works like a charm, but if Apple wanted an iMessage client…
His first sentence about privacy and security is nonsense, but his second sentence hits the nail on the head. If the richest company in the world wanted their chat app to run on Android, it would by now. It's strange Apple doesn't sell an iMessage Android app, but I'm sure they've had somebody do the math and found out that it's more money for Apple in the long run if they don't.
Or put another way: If the privacy and security of imessage is compromised by someone building another client, I'd argue that you never had either to begin with.