- current usb-a sockets (computer/car/wall/airport chargers) will be incompatible, not that apple cared much about compatibility in the past.
...except they were one of the first to use USB-A sockets in the charger
when other makers were still using chargers with custom, captive cables. Magsafe, 30-pin and lightning all did things which the contemporary standards could not, even their various annoying display connectors were used because the "standards" (VGA, DVI, DisplayPort) had unnecessarily big, chunky connectors.
Meanwhile, I'm nicely endowed with USB-A mains adapters for home, work, travel and it would be... vexing if I had to change.
- a female usb-c to male usb-a adaptor is something very easy and compact, in case we want compatibility.
...as is a female USB-A to male USB-C adapter (which will be the first thing any 12" MacBook user buys)
Meanwhile, forget shipping the same power adapter with the iPhone and the 12" MacBook:
...spot the difference (and there will probably be an even bigger brick for the rMBPs if they switch to USB-C) .
- the power adapters could shrink, even if just a little bit.
I doubt that the USB-A socket is the limiting factor on the size of the power adaptor (the mains plug & coils, more likely). Certainly the UK ones are as small as they can get.
- delivering more power than 5V-1A will be easier and better supported by 3rd parties, since it's part of the usb-c specifications.
Yes, the usb-c specifications... they've worked well (https://www.engadget.com/2015/11/04/google-pixel-engineer-vs-shoddy-usb-type-c-cables/
) - that guy may be testing cables, but it doesn't raise great hope for 3rd party chargers, either.
- future macs will also transition to usb-c in a matter of months.
We still don't know the details or the timing. However, the "leaked" case designs seem to rule out MacBook-style tapered cases (which would only leave room
for USB-C ports) so its possible that the new MBPs will have both C- and A- ports.
Another consideration here: Skylake CPUs require a separate Thunderbolt 3/USB-C controller for each pair of ports, whereas the next generation "Kaby Lake" will have a controller on-chip. (Remember, Apple delayed the rollout of USB3 until Intel produced CPUs with integrated USB3 controllers). Can't see Apple putting two
discrete controllers in a MBP, and I don't think that 2xTB3 plus squat is enough for a MBP (unless Cook and Ive think that the rose gold case option makes up for it), so, I still wouldn't rule out Apple delaying the TB3 rollout until Kaby Lake. Or, going with 2 x TB3 + 2 x USB-A this year and 4 x TB3 (only) when Kaby Lake is available.
End of the day - anybody who is inconvenienced by the lightning-to-USB-A cable can already simply buy one of these (http://www.apple.com/shop/product/MK0X2AM/A/usb-c-to-lightning-cable-1-m?fnode=85
). I'm sure that apple will switch at some time in the future, but its only a cable and doesn't have to be tied in with a major launch.
More likely: Apple decides to stop bundling a mains adapter at all
(it is kinda wasteful - I've already got enough adapters & computers with always-powered USB sockets to recharge the moon).