No need to carry anything. Wherever you go has an HDMI cable as part of the setup but not a USB-C cable or a video protocol over USB-C input. There are multiple kinds of USB-C cables too, and I don't know whether all of them support video. They might not even have Mini DisplayPort, but some setups do keep dongles for it since Macs have used it for so long.You carry around an HDMI cable, yes? Or do you rely on the kindness of strangers? What is the difference between carrying around a regular HDMI cable and carrying around a USB-C to HDMI cable?
Funny thing is the slimmer rMBP *added* HDMI, which the older MBP didn't have. It was the first and the last time any Mac had a regular video output, i.e. one that's ubiquitous and requires no explanation.
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So you have the same exact functionality as the older MacBook except you have to buy and repeatedly reattach a dock for the old ports. Unless you have something at home that's specifically TB3-only or USB-C-only, which almost nobody has.You don’t have to carry a dongle. I use an excellent dock that attaches to the MacBook, matches the color too. The beauty is that I can detach it when I’m at home with my USBC and TB3 accessories. But if I’m somewhere with legacy stuff, it’s all integrated. No need for a dongle
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