Slight nitpick: this isn't "natively booting" System 7, nor is any other PowerPC Mac. This is simply an emulator, no different than using vMac, qemu, etc. - it

Slight nitpick: this isn't "natively booting" System 7, nor is any other PowerPC Mac. This is simply an emulator, no different than using vMac, qemu, etc. - it just happens to be an emulator that Apple has been shipping with PowerPC Macs since it introduced the Power Mac 6100, which "natively" booted System 7.1.2. Nonetheless, this is an impressive accomplishment.