USBC and TB3 are the future. Nobody wants a slower and bigger and less useful port.
I think, though, that USB-C/TB3 will only take off when there's a critical mass of peripherals that *only* support it (stuff like eGPUs is a good start but obviously attracts only a niche audience). Storage for most consumer purposes is absolutely "fast enough" (as far as those consumers are concerned) on USB 3, even USB 2.
USB-C/TB is absolutely technically superior in all ways to the classic nonreversible USB ports; it is not useful enough *in practice*, though, until it's the standard (or well on its way to getting there).
I know people were mad about the MB/MBP's USB-C thing, but what's honestly perplexed me is that it was a *less* aggressive push than Apple usually goes for. The transition from the 30-pin adapter to Lightning and the transition from ADB/SCSI/etc to USB 1.0 were much more "adapt or die - this is how all of our devices work now."
Put in other words: I'm not mad that Apple made USB-C the only port on the MB/MBP, I'm mad that they didn't do the same thing on the iMac/Mac mini/Mac Pro/MacBook Air, let alone the iPhone and iPad and the assorted iPods. If Apple had forced the standard across much more of their ecosystem, there would have been *more* grumbling and yet the transition would have happened pretty damn quickly and the USB-C ecosystem would be far more robust today.
Lightning's slightly smaller size is one decent reason to stick with it on some of the devices, but I think MFi-certified USB-C would make a lot more sense in the long run. There's absolutely no excuse for the default power supply that comes with iPhones to be the ancient marshmallow adaptor plus a USB 3-to-Lightning cable in 2018; that sort of thing is deeply symptomatic of bean counters running the company instead of people who can make tougher decisions.
