The limitation was added after the fact anyway, like I mentioned in my edit, secure enclave wasn’t added until the A7 chip, which was first used in the iPhone 5S in 2013, two years after iMessage became available.
It’s really not necessary though, it’s just a justification after the fact. There are several secure e2e apps available without utilizing a special chip to house that data, even Google has e2e with their RCS implementation
The limitation was added after the fact anyway, like I mentioned in my edit, secure enclave wasn’t added until the A7 chip, which was first used in the iPhone 5S in 2013, two years after iMessage became available.
Although true, it was added to make iMessage (and every other service) more secure, not just as some sneaky way to keep iMessages off android devices.
It’s really not necessary though, it’s just a justification after the fact. There are several secure e2e apps available without utilizing a special chip to house that data, even Google has e2e with their RCS implementation