So do you make sure all laptops you buy have a VGA and PS2 ports?
I get your reasoning, and right now, yeah, having a few extra ports might be helpful. But in a couple of years, which I'm sure most customers buying a MacBook will keep it, we'll see more and more USB-C devices and less of the older ones.
Even on my 2006 MB, I don't think I ever used the FW port more than 2 times, and it was mainly just to try it out. Sure, others may have used it all the time, but we have to move on. I'm sure Apple has data on how many people use them and where they're using them.
I don't encounter much VGA or PS2 anymore. But I do encounter the modern standards at every stop (on the road). Unless I've brought along my own adapters & dongles, there's no hooking up to anything. Nobody seems to have much USB3C+Thunderbolt 3 in their offices, in hotels, etc.
I get the "but in a couple of years" argument but these things are fundamentally tools. I'd like my tools to work really well for me between now and "a couple of years." Once it's as ubiquitous as current standards such that the problem is solved, deprecate the old, as has mostly happened with older standards like PS2, VGA and FW. But this idea of having to jettison utility (to dongles/adapters) to spur on the change "in a couple of years" is us just swallowing a pill to suffer/deal with it. It's even more fun to pay even more than Apple laptops used to cost that came with the stuff now shifted out to dongles built within.
If Apple has that data, they MUST know that just about everyone is still connecting their stuff to stuff that does not yet have USB3C/Thunderbolt 3. So if Apple is listening to their data and building for our present needs, they would be building in a basic set of ports. However, it appears that Apple is building for "the future" (but
selectively: drop a headphone port here but not there, USB3 here but Lightning there, etc) and we are just expected to roll with adapters/dongles in support of it for- as you say- upwards of at least a "couple of years." I'm sure Apple is happy to sell us those dongles & adapters as add-on sales... and/or the licensing revenues that come from others selling us stuff to connect via Lightning.
Apple adopted Thunderbolt 1 and the marketplace generally did not make much stuff with Thunderbolt 1. How many years ago was that now and how much Thunderbolt 1 stuff is available in 2017.
Along comes (Apple adopting) Thunderbolt 2 and the marketplace generally did not make much stuff with Thunderbolt 2. Where's the Thunderbolt 2 peripherals in late 2017?
Now we're adopting USB3C+Thunderbolt 3 and the marketplace has generally not rolled out much stuff with that either. See a pattern here?
I'm all for including a USB3C+Thunderbolt 3 port on laptops to migrate toward "the future." I'm less happy with there being nothing else in exchange for higher prices and an expectation that we'll cover that base by spending even more on dongles and/or adapters. And I have much less faith than you that "a couple of years" will see much adoption of USB3C/Thunderbolt 3 on common peripherals... just as Thunderbolt 2 and 1 before it did not see much adoption upwards of well over "a few years" right up to now.
Will we get there? Probably. USB3C+T3 is a NICE idea with a lot of potential. But us just willingly accepting the hassle between here and there and even attempting to rationalize it to each other like it's some good thing for us is pretty hard (for me) to see.