I'm not here to argue semantics. But look it up:
https://en.wikipedia.org/wiki/Legacy_port.
The key part
"A legacy port is a computer port or connector that is considered by some to be fully or partially superseded.[1] The replacement ports usually provide most of the functionality of the legacy ports with higher speeds, more compact design, or plug and play and hot swap capabilities for greater ease of use".
Legacy doesn't mean USB-A is dead (which is what I imagine you think it means).
That's not what I meant. You say USB-C superseds USB-A. I say it's a different port altogether, even if they're both called USB-something.
Again, USB-A is not legacy. It's the de-facto standard for peripherals.
Didn't happen doesn't equal won't happen. As far as I can remember they didn't put a timescale on it.
I didn't say they did, but there were lots of conversations on the forums similar to the one we're having right now. True Believers like yourself were stating that pretty soon we'll all move to USB-C, and the blind fools such as myself were saying it won't happen that quickly, and putting only USB-C ports on a laptop is a bad design decision. It was true then, it's true now.
All I can point to is the past when it comes to Apple and their decisions. 4K Blu-Ray is neither here nor there in this conversation.
So let's talk about changing ports. Docks, cables, car systems, speakers etc. etc. there was a whole ecosystem around the old 30-pin dock connector. Apple ditched it for a "new reversible, smaller connector". Lightning. People complained for a while, then things became normal.
You dismissed out of hand my 4k BluRay analogy, which I think it's quite precise to describe why USB-C adoption is so poor, but chose one that truly has no bearing on this conversation. Apple replaced a proprietary iPhone/iPad connector with another proprietary iPhone/iPad connector, and people had to change their iPhone/iPad peripherals. Great. It has nothing to do with the computer industry as a whole adopting USB-C at any speed. The Macbook line is a small fish in a big sea. It won't force the adoption of USB-C or anything like that.
We can all agree the MPB has a wider variety of USB-A peripherals than the iPhone had 30-pin dock connector accessories. But that doesn't mean things won't turn eventually. This is one of the reasons I'm glad Apple have gone "all in" on USB-C. Adding just 1 legacy USB-A port would have meant people had no reason to change and given accessory/peripheral manufacturers an excuse to continue building things with USB-A. Change would've been slower.
I very much doubt it. The fact that Apple made the stupid decision to ship USB-C only computers will have no impact on the industry. It will simply inconvenience its users, who are going to be in dongle hell for the lifespan of these computers.
Depending on your age you'll remember the uproar when Steve Jobs released the iMac with only USB ports back in '98.
There's port change and port change. USB solved a real problem. It replaced a variety of ports with one that was small, hot-pluggable, had device classes (standardised programming interfaces) so people moved away from installing drivers for everything. It was great, and I personally embraced it at the time, along with most of the industry.
For most intents and purposes, USB-C is just a smaller, nicer connector. It brings no advantage when you plug in a mouse, a keyboard, a printer, a scanner, a webcam, your mobile phone, etc etc. Most users just wouldn't see any difference.
Yeah so it has display data. So what? Virtually everybody needs an adapter to connect an external monitor to it, just like they needed an adapter before. And no, we're not moving to USB-C monitors. As things stand today, even state-of-the-art graphics cards don't output on TB3 via USB-C, and there's no sign they're moving in that direction. The signs point to DP1.4, that's about it.
If they weren't useful people wouldn't be able to use them.
A lot of the time people will be there with their shiny new laptop with only USB-C ports, realizing that they don't have the dongle, or they forgot the dongle, or that the dongle doesn't work, or that the dongle just did a kernel panic (watch the dongle thread), or that the dongle fried something. Not very useful.
Nobody except for the dongle sellers are getting anything good out of this.
I'm lucky I'm a light port user at the moment. If I were regularly plugging in stuff, I wouldn't dream of buying this new MBP at half the price.