Earlier quoted context omitted.
Apple maintains iMessage compatibility with devices that are long out of support, if Beeper Mini is sufficiently similar to the client in for example iOS 12 then it makes an Apple decision to break Beeper fairly expensive. Even if they do the work to publish iMessage updates for the old iOS versions it just buys a little time before the new version gets reverse engineered, and that at the cost of poor user experience…
> Even if they do the work to publish iMessage updates for the old iOS versions it just buys a little time before the new version gets reverse engineered There's probably a cliff in complexity. Once Apple starts requesting signed attestations from the secure enclave on the devices that have one, it's game over. They probably don't just yet, since still too many people use iMessage on first-party clients that don't ha…
I would think that’s the biggest issue right now. If spammers can register “real” iMessage accounts at scale without Apple hardware, Messages becomes less pleasant, very quickly.