They deprecate the feature on Macs without T2 chips because that's where the video stream encoding is done: in hardware. The CPU encoding performance isn't good enough.
Meanwhile, you can buy a Luna Display for your older kit to do the same thing with roughly the same performance, because that also does encoding in hardware.
And adding a new feature to newer hardware doesn't obsolete your old hardware. If Apple release a 5G phone in September, your not-5G iPhone will still work.
Meanwhile, you can buy a Luna Display for your older kit to do the same thing with roughly the same performance, because that also does encoding in hardware.
And adding a new feature to newer hardware doesn't obsolete your old hardware. If Apple release a 5G phone in September, your not-5G iPhone will still work.