And if Apple doesn't provide a Metal RTRT API for third-party devs to target now, then whenever the hardware acceleration does show up third-party apps won't be

And if Apple doesn't provide a Metal RTRT API for third-party devs to target now, then whenever the hardware acceleration does show up third-party apps won't benefit from it right away. Apple will want the new hardware to bring immediate, large performance boosts to existing apps, not months and years of delay and hesitation from ISVs. Besides, they couldn't do any software RTRT themselves without writing a library for it anyway.