I work with and know plenty of people who groan at the idea of an all USB-C primary MBP for getting work done that swap phones and other hardware quite frequent

I work with and know plenty of people who groan at the idea of an all USB-C primary MBP for getting work done that swap phones and other hardware quite frequently. Also, it's not just about being totally USB-C w/ the MBP: - Loss of HDMI port. Big for me because I often need to plug in to a projector. - Loss of SD card slot. I use this a few times a week for the 3D printer at least. Photographer friends live off the thing. - Micro electronics work: You already have to run USB 3 through a USB 2 only hub to smooth things out with certain devices. USB C will be at best, equal to that. - Not a lot of docking station/monitor support for USB-C yet. Between my two monitors it's a two wire connection for my laptop to connect to all my peripherals, none of which are USB-C. I need four things to charge every device I have, all of which fit in my laptop bag and provide no confusion (unlike the myriad USB-C cables that look exactly the same but don't do what you expect): Lightning cable, micro-USB cable, USB-A charging block, laptop power brick. If I was desperate for space I could drop the small USB charging block and just plug in to the laptop to charge. Now, I'm not arguing AGAINST USB-C, there's just not enough of an ecosystem to make the transition as easy as what I have today. I don't want new technology and to spend money on something that at best, breaks even. These are the tools of my craft, they should make it easier to do my job, solve an acute problem that I have, or just generally make the experience better in some way. So in 18-36 months when there's a monitor with the 4K (or better) resolution of mine and a USB-C hub built in that is cheap enough for me to buy two or three, then I'll be making the switch. Additionally, if you look at the recent entrants to USB-C, if you've got a half decent laptop, they're not screaming for you to upgrade to them. For example, there's no reason for me to upgrade my 2015 MBP to a 2016 touch bar when they've got practically the same internals. The same goes for all the other brands out there, if your laptop is less than 18 months old, you're getting about the same hardware you already had PLUS an ecosystem challenge with USB-C.