Yes, that is exactly correct. If the next revision of the 12" rMB has a second port, they will have gone back on their design philosophy for the line. A lot has changed since the original MBA. All day battery life under typical use is a reality now. The 2011 11" MBA replaced by my rMB got 3-4 hours max. By the time the 2013 MBA's came out with all day battery life, the design was 5 years old, but there wasn't anything as far as connectivity technology that would have allowed them to do what they achieved with the rMB until now.
A lot of other technological advances have converged over just the past couple of years that have led to the rMB. The ubiquity of wireless cloud services, advances in cellular technologies as well as signal coverage of the same, CPU power and efficiency, etc. all didn't exist when the original MBA came out. It seems pretty ovbious that the rMB is actually what Apple wanted to make with the original MBA but the tech didn't exist then. I don't think we'll see a repeat of the MBA revisions with the rMB. The market is now ready for these types of laptops, and the tech exists now to provide them.
You found an interesting adapter. Thanks, i bookmarked the link.
I guess the current design stands and falls with the future of the Macbook Air. Right now Apple saw an window of opportunity to be a technology leader with a radical thin and light concept, which they could sell to small and profitable target audience. Nothing wrong with that, but Apple has a history of making adjustments of their design if they think that they can make more profit.
I don't know if the "masses" and prize sensitive macbook air buyers are ready to go fully wireless. Sure some people can, others will still rely on their cables and old equipment for the next years. It doesn't seem to be a problem on iOS devices, but i think the expectations for a notebook are still different. And things like e.g. Airdrop, Airplay (Mirroring) aren't perfect and still have a long way to go in terms of cross platform compatibility.
The Magsafe was only an example. As i said they could come up with more nifty solutions for the power plug/cable, maybe some kind of splitter charging/usb c or switch to wireless charging in the long run. I don't know if Apple did themselves a favor by not offering an accompanying USB/C Display, USB C Lightning cable and a full fledged docking station. They could have shown the world that this transition could be really smooth without loosing to much backward compatibility. But i am excited to see what will happen in the future with the next rMBP and USB/C TB3 stuff like eGPU and better wireless solutions.
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