Apple is always pushing 'different' connections. They pushed Firewire, but nobody ever used it, apart from some people in edge cases (and Apple users themselves). They also helped intel to develop Thunderbolt. I've never seen a Thunderbolt device in the wild in the Netherlands.
USB is a mess now. Previously we had USB, USB2, and USB3, and they were backwards and forwards compatible. Now we have those three, but we also have USB3.1 Gen1, which is basically USB3, we have USB3.1 Gen2 which is basically faster USB in a USB3 connector, and we have both USB3.1 Gen 1 and Gen 2 inside the USB-C connector; and that connector also supports Thunderbolt 3 and HDMI and even SATA/PCI-Express if I remember correctly.
I don't know for sure. I would have to read up on this... and I'm in IT. Imagine how 'normal' people feel about this. (I don't know if the USB mess is Apple's fault though.)
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