The author published a follow-up post and revised diagram, https://randomaugustine.medium.com/more-speculation-on-exclaves-d4b94182b54b https://randomaugustine.

The author published a follow-up post and revised diagram, https://randomaugustine.medium.com/more-speculation-on-exclaves-d4b94182b54b https://randomaugustine.medium.com/more-speculation-on-excla... > While I speculated that TrustZone was being used, exclaves may well use the existing SPTM and GXF (Guarded Execution) privilege levels after all. One implication may be that there is no hard reason they couldn't be supported on iPhone 13 and higher, aside from RAM requirements and development effort. Make no mistake these are huge undertakings even for Apple.