The data transfer protocols are named 1.x, 2.0, 3.0, 3.1, and 3.2.
Oh, and for completeness 3.1 comes in two versions - 3.1gen1 (5Gbps) which is, for practical purposes, just 3.0 re-named, and 3.1gen2 (not to be confused with 3.2) which is the new, improved 10Gbps version...
all of which support good old USB-A connectors.
USB 3.2, on the other hand, means running
two lanes of USB3 5Gbps or 10Gbps data over a USB-C cable (which currently, surprisingly, only uses one lane for USB3) to get up to 20Gbps of bandwidth. As such, its the only one on your list that actually
needs USB-C cables, but it was only announced last summer and is not supported by any currently available computers, hub/docks or peripherals (but you'll be able to keep your cables, which is nice).
Reliable information from usb.org press release here here:
http://www.usb.org/press/USB_3.2_PR_USB-IF_Final.pdf
Or, amuse yourself by reading "Trusted Reviews" demonstrating USB-C's potential for confusion by getting USB3.2
completely wrong here:
http://www.trustedreviews.com/news/usb-3-2-care-3173569
it's 2018... if you're plugging in that many USB devices directly into your laptop... you are doing it wrong.
Yeah, those $5 USB-C cable/adapters really add up
...well, yes, $5, $10, $15, $20 here and there
does add up if you're going to re-cable all of your USB-A devices with USB-C cables, not to mention the $priceless when someone at a meeting hands you a flash drive and you don't have your adapter with you...
FUD. There is no mass confusion.
Well, we can start with all the USB-C evangelists who think that it is faster than USB-A. Then there's Trusted Reviews getting USB 3.2 completely wrong (see above).
But maybe you really don't think that it will be confusing to multiple types of
superficially identical cables with quite different functions (charge cables that support full current charging but can only carry USB 2 data, cables that support USB3.1 and DisplayPort but won't enable 100W charging and won't carry Thunderbolt, passive Thunderbolt cables that also do USB 3.1 and DP (but not all of which support 100W) and
active Thunderbolt cables which do TB3 but only USB2.0 and can run
Thunderbolt displays (that use DisplayPort-over-Thunderbolt) but not
DisplayPort displays (that use USB-C DisplayPort alt mode). ...and I'm not making this up: all of those permutations are available from Apple (including the LG 4k display which uses USB-C DP alt mode, and the LG 5k display which uses Thunderbolt). Believe me - once those cables start to get jumbled up, there will be confusion.
If you can't figure out whats going on, A usb 3.0 port would need to hang off the PCH, the inclusion of which would have negatively impacted the available bandwidth for the SSD and/or Wifi controller.
CPU chipsets can be configured in a multitude of ways based on the manufacturer's requirement, so its not really fair to take the existing configuration - which was predicated on 2 Alpine Ridge TB3 controllers - and ask "how would we kludge a USB 3.1 port into this". What a lot of us are suggesting is that 2xTB3/USB-C + 2xUSB-A would have been a better
interim design, with all-TB3 still a couple of years ahead of its time. (Also, I may be wrong but I believe that Alpine Ridge can be configured for 1xTB3/USB-C + 1xUSB A 3.1).
Or, the other possibility would have been for Apple to have released the radically re-designed, thinner, crispier, USB-C only MBPs as-is while
also upgrading the 2015 rMBP design to the latest CPU and display panel. Which is exactly what they did with the classic MBP in 2012 when they released the then-radical rMBP.
Why can’t a tv with 3 hdmi inputs come with 3 hdmi cables?
...because then the store couldn't try and sell you a $70 Monster hand-rolled, dolphin-friendly, solid unobtanium HDMI cable that delivered straighter '1's and rounder, fatter '0's to your TV. That is fairly well known. Its not a good reason.
Meanwhile, whenever I've bought
computer displays from HP or Dell they've come with some cables, and many USB-C hard drives etc. come with both USB-C-to-C and USB-C-to-A cables or adapters in the box (as did dual USB/Firewire devices back in the day). Apple could have retained a lot of good will by chucking one or two of those proverbial $5 USB-C-to-A dongles (which would cost Apple a lot less than $5) in the box with their $2000+ computer. Or, at least having an Apple-designed-and-tested multiport dock with USB-A, SD and MiniDP in the Store for a subsidised price from day one.