- May 29, 2013
- Asus Z370-G Gaming (Wi-Fi AC)
- i9-9900K OC'd @ 5.0GHz
- RX 6600 XT
- Classic Mac
- Mobile Phone
Typically T2(an A10 variant) was for Secure Enclave(Flash storage encryption and drive management). Touch Bar control too I think on the MBP's. Today confirmed that all macOS products going forward will feature a T2 chip.
What is rather surprising, was the mention of HEVC encoding via T2 (I assume decoding as well). There was interesting wording about the MBA's 13 hours of "iTunes video playback". Looks like Apple is outright saying their own low-power T2 chips can hardware (decode)/encode better than their intel silicon.
First it was Secure Enclave, then it was Camera-facetime magic, then it was Hey Siri, now it's video decoding/encoding. Most of these can be excused to be in the realm of security, by keeping them separate from the core operating system. But now they are outright leveraging it for efficiency. There is a large amount of marketing surrounding the A12X in the new iPad Pro, with claims of being more powerful than 92% of ultrabooks(or game as well as an Xbox One S). Anandtech had done an article on the iPhone's A12, and found it in certain circumstances approaching desktop-level performance.
I'm speculating out of my ass.. but Apple is going forward with Apple-chip-Hybrid-Intel for the immediate future, and obviously back-support the older standard intel hardware. But your concerns are starting to add weight as it appears Apple is leveraging more controls in their low-power T2 chips. For the Apple customer, this is a benefit. For the hackintosh scene - immediately not a problem.. but.. who knows? I'd say they'd need a good few years of T2(and whatever succeeds it) in all products to drop intel-only macOS support. macOS 10.18 maybe? They have set the precedent in the past for dropping old hardware (32bit EFI GPU, non-metal-compatible GPU's).
I'm pretty sure that T2 is also responsible for RAID in the iMac Pro and TouchID.