What's the next? USB4 or TB4?
Consider TB3 & USB4 & TB4 all have the same bandwidth. Would USB4 to be the next standard eGPU port?
Should I wait for a USB4 eGPU for my next USB4 MacBookPro?
TB3 will be entirely optional for the host part of the USB4 hierarchy, but part of the spec for the hub level. Which begs the question for me as a layman: Will we end up in another USB Gen X quagmire or TB3 controller hunting situation? If not then I would assume the entire industry will move to USB4 in short order as it's a royalty free standard with interoperability with USB. If the confusion persists I hope TB3 will remain as a guarantee of compatibility to the average customer.
I'm entirely open to having misunderstood parts of this however, so correction is welcome.
As a side note it would be interesting to see what the heck TB4 is supposed to be since the speed vs TB3 is apparently the same.
@leovinus, I agree. But rumor said it will be 2022 to see the mac sopport USB4. WHY?
If USB4 will unify all of those ports, why apple waiting? I think the 2020 iPadPro should be USB4 but it is not.
@ys_l, Apple already uses a combined TB3 and USB 3.1 Gen 2 compatible port. For them a move to USB4 would be a distinction without meaning. USB4 is just a way to give everyone the same benefit of clarity Apple already serves their customers with. The only reason for them to switch nomenclature to USB4 would be to avoid having customers constantly ask if their new USB4 device is supported on their Mac. And even then I'm not sure they'd change it, since they have set up an entire ecosystem around Thunderbolt both from a technical and marketing perspective.
@leovinus, Okey. I got understand why apple did not hurry with it. The same for the eGPU market.
And there is another rumor about ARM Mac, apple might integrate USB4 to its new ARM-mac, not Intel-mac.
Or even more apple might publish a higher bandwidth port (lighting2) on its own ARM architecture, witch is more than 40Gbps, is that possible?
@ys_l, I don't give the ARM rumour mill too much mind at the moment. Apple has a tendency to move in their own way and at their own pace. Where they choose, and when, to enter the ARM part of their future computer roadmap is vague at best.
But speaking entirely on speculation I don't think they'd develop a faster Thunderbolt implementation without Intel. If for no other reason then that there'd might be patent disputes. A faster Thunderbolt iteration is certainly going to come at some point though. Either as Thunderbolt 5 or through some USB5 standard update.
Not that Apple is averse to pushing their own standards in partnership. FireWire was a collaboration with Sony, LG, and a myriad others for example. If they feel Thunderbolt/USB 3/4 isn't enough for their needs they might very well go that route. But I don't see them needing to in the short term at least.
This is all just speculation on my side though. I don't portend to have any deeper insight into Apple than the next guy or gal.
@leovinus, I think apple needs a better port even than USB4 - 40Gbps, for AR/VR video database wired transmit. Apple will drop away Intel for the ARM device, and AR/VR is all based on ARM. So apple will chose to use USB4 or invent a better port for their own. It is depends on the bandwidth of AR/VR transmit needs. And this new port will be set to all of the ARM device. Any idea?