This was the obvious outcome. People were being willfully blind about how this "hack" works. Using an exfiltrated binary they used its blackbox functions to perform a sort of device attestation using ripped Apple device identifiers. Clearly Apple simply needs to blacklist any device attestation that this service uses, which is obviously trivial. These aren't just RNGs they're fabricating, they're sets of legitimate A…
And there was major hubris from the makers. They were arguing that because it was all totally above board Apple wouldn’t be able to block the service without impairing iMessage entirely. Wrong
What do you mean by above board? What they claimed is that there is no way of telling Beeper Mini clients from an old iPhone, therefore Apple wouldn't be able to block one without blocking the other.
Clearly Apple managed to find a way, and who knows if there will be some more cat and mouse happening here. In theory though, I don't see why it wouldn't be possible to have a service that's indistinguishable from an old iPhone.
Newer devices can use device attestation, but old iPhones don't have secure enclave.