Joined finally just to add my useless input into the mix.
I've been a Mac user since 2011 (Early 2011 MBP was my first purchase). Now, starting at that date, I've been plugging less and less into my Mac's as time goes along. I've never owned a Mac Desktop but only their laptops. I just bought a fully upgraded 2016 15" rMBP with 512GB SSD.
Truthfully I could care less about the removing of most of the ports. The only ports I ever used on the previous ones were USB and MagSafe. I will miss MagSafe but think USB-C for power was a worthy trade off. Don't trip over the cord is all I can say.
I get that we/those of us spending that much money on such a purchase hate to have to spend anything else to get it to work. But honestly if you can afford a $2,000 laptop and honestly make the purchase knowing it only has 2 or 4 USB-C ports, you can afford a few bucks here and there for an adapter. Me? I bought a single USB-A to USB-C adapter (Anker), a single USB-C to USB Micro B (Monoprice), and a single card reader (Kingston). All of these was basically a total of about $25. That's .8% of the cost of the laptop itself. Honestly, how many of you have spend hundreds in the past buying different accessories, adapters, cables, docks, and mounts for your laptops in the past simply because you wanted to. Me myself, I have been guilty of spending more than a few bucks to replace a fully functioning cable with a "nicer" fully functional cable just because it is a nicer, better looking cable.
The thing I miss most will be the SD card reader. But to be fair that's only because I lucked out and my 6D uses SD cards. If I used CF cards then that port would have been 100% useless. Hopefully in the future Canon decides to put high speed USB-C ports on their cameras.
For everyone complaining about not being able to plug your iPhone up to the new MacBooks, I get it. You are looking for a reason to complain. The truth is that you don't need a dongle. You'd need a USB-C to Lightning cable, which Apples happens to sale. It also falls in line with pricing of regular Lightning cables you've been using (USB-A to Lightning). I think I could count on one had the number of times I have hooked my SE up to any computer. Some people do, I get that, but it doesn't affect me. If it did, I'd either use a USB-C to USB-A adapter and use my existing cable, or I'd pony up and buy the right cable for the job.
Now, I would hope that Apple eventually adopts USB-C as their mobile charging solution. I was honestly happy to see them basically adopt a standard with the redesigned MacBook for charging. I liked the benefits of the Lightning cable connector but think USB-C is the standard that surpasses it. It's time to move on, but that takes time. Heck, had the iPhone 7 used USB-C everyone would be complaining about how existing cables/accessories no longer work and they need an adapter to plug the phone up to their older computers that don't have USB-C.
Originally before release I was mildly optimistic that perhaps they would put a female Lightning port on the new 2016 MBP so existing iPhone dongles would work. Then I realized that people would try to use their Lightning chargers to charge their MBP and that wouldn't work.
Now, yes a lot of this is a ploy for money. Of course it is, Apple is in the business of making money. But it is also a ploy to move into the future or even accelerate the industry moving to the future. Guess what? I just bought my first USB-C accessories because of this purchase. In a few years, maybe sooner, lots of stuff will be USB-C. Less and less adapters will be needed.
And, for those that keep posting pictures of stupid Macs with stupid dongles and cables in a mess, think about this. A single, small diameter, very flexible, and arguably affordable cable can be plugged into one port on either side of your new MBP. Power, data, networking, etc can all be pushed over this one cable to a "docking station", monitor, whatever. That is as seamless as a workstation you can have. Previously do that you'd have cables running out both sides of the MBP, big ones, different colored ones, going each direction.